diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/asMethodReturningString.named..st b/repository/Grease-Core.package/GRPlatform.class/instance/asMethodReturningString.named..st
new file mode 100644
index 00000000..364e0bf1
--- /dev/null
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/asMethodReturningString.named..st
@@ -0,0 +1,21 @@
+file library
+asMethodReturningString: aByteArrayOrString named: aSymbol
+	"Generates the source of a method named aSymbol that returns aByteArrayOrString as a String.
+	
+	This implementation answers a String formatted like so
+	
+	aSymbol
+		^ aByteArrayOrString
+	
+	Subclasses need to override this method if the dialect needs changes to support Unicode string literals"
+	^ String streamContents: [ :stream | 
+		stream
+			nextPutAll: aSymbol;
+			nextPut: Character cr.
+		stream
+			tab;
+			nextPutAll: '^ '''.
+		aByteArrayOrString greaseString do: [ :each | 
+			each = $' ifTrue: [ stream nextPut: $' ].
+			stream nextPut: each ].
+		stream nextPut: $' ]
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/base64Encode..st b/repository/Grease-Core.package/GRPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..1e94d60c
--- /dev/null
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/base64Encode..st
@@ -0,0 +1,4 @@
+encoding
+base64Encode: aByteArray
+	"Base64 encode the given byte array and answer the result as a String."
+	self subclassResponsibility
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/doSilently..st b/repository/Grease-Core.package/GRPlatform.class/instance/doSilently..st
new file mode 100644
index 00000000..89a96f47
--- /dev/null
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/doSilently..st
@@ -0,0 +1,4 @@
+file library
+doSilently: aBlock
+	"Suspend all notifications value evaluating the given block."
+	^ aBlock value
\ No newline at end of file
diff --git a/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/base64Encode..st b/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4a3631f8
--- /dev/null
+++ b/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ (Base64MimeConverter mimeEncode: aByteArray readStream) contents
diff --git a/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4cb93d20
--- /dev/null
+++ b/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ aByteArray base64Encoded
\ No newline at end of file
diff --git a/repository/Grease-Pharo60-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Pharo60-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..f5e24f05
--- /dev/null
+++ b/repository/Grease-Pharo60-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ (Base64MimeConverter base64Encode: aByteArray readStream) contents
diff --git a/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4cb93d20
--- /dev/null
+++ b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ aByteArray base64Encoded
\ No newline at end of file
diff --git a/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4cb93d20
--- /dev/null
+++ b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ aByteArray base64Encoded
\ No newline at end of file
diff --git a/repository/Grease-Squeak5-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Squeak5-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4cb93d20
--- /dev/null
+++ b/repository/Grease-Squeak5-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ aByteArray base64Encoded
\ No newline at end of file
diff --git a/repository/Grease-Squeak6-Core.package/GRPharoPlatform.class/instance/base64Encode..st b/repository/Grease-Squeak6-Core.package/GRPharoPlatform.class/instance/base64Encode..st
new file mode 100644
index 00000000..4cb93d20
--- /dev/null
+++ b/repository/Grease-Squeak6-Core.package/GRPharoPlatform.class/instance/base64Encode..st
@@ -0,0 +1,3 @@
+encoding
+base64Encode: aByteArray
+	^ aByteArray base64Encoded
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/runCase.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/runCase.st
new file mode 100644
index 00000000..9465625f
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/runCase.st
@@ -0,0 +1,3 @@
+running
+runCase
+	GRPlatform current doSilently: [ super runCase ]
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/supportsUnicode.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/supportsUnicode.st
new file mode 100644
index 00000000..a22719d9
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/supportsUnicode.st
@@ -0,0 +1,10 @@
+private
+supportsUnicode
+	"dynamically try to figure out whether the current dialect supports Unicode"
+	^ [ 
+		String
+			with: (Character value: 16r1F1F3)
+			with: (Character value: 16r1F1F1).
+		true
+	 ] on: Error
+		do: [ :error | false ]
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testBase64Encode.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testBase64Encode.st
new file mode 100644
index 00000000..d1a2b4be
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testBase64Encode.st
@@ -0,0 +1,14 @@
+tests
+testBase64Encode
+	| input |
+	input := #(
+		(97 110 121 32 99 97 114 110 97 108 32 112 108 101 97 115 117 114 101 46) 'YW55IGNhcm5hbCBwbGVhc3VyZS4=' 
+		(97 110 121 32 99 97 114 110 97 108 32 112 108 101 97 115 117 114 101) 'YW55IGNhcm5hbCBwbGVhc3VyZQ=='
+		(97 110 121 32 99 97 114 110 97 108 32 112 108 101 97 115 117 114) 'YW55IGNhcm5hbCBwbGVhc3Vy'
+		(97 110 121 32 99 97 114 110 97 108 32 112 108 101 97 115 117) 'YW55IGNhcm5hbCBwbGVhc3U=' 
+		(97 110 121 32 99 97 114 110 97 108 32 112 108 101 97 115) 'YW55IGNhcm5hbCBwbGVhcw==').
+	1 to: input size by: 2 do: [ :index |
+		| decoded expected |
+		decoded := GRPlatform current base64Encode: (input at: index) asByteArray.
+		expected := input at: index + 1.
+		self assert: decoded = expected ]
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st
new file mode 100644
index 00000000..cfe0c3ff
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st
@@ -0,0 +1,17 @@
+tests-file library
+testCompileAsciiString
+	| selector expected source |
+	
+	self supportsUnicode ifFalse: [
+		^ self ].
+	
+	selector := #stringMethod.
+	expected := 'test ok'.
+	source := GRPlatform current asMethodReturningString: expected named: selector.
+	[ 
+		| actual |
+		GRPlatform current compile: source into: self class classified: 'private'.
+		actual := self perform: selector.
+		self assert: expected = actual
+	] ensure: [ 
+		GRPlatform current removeSelector: #stringMethod from: self class ]
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st
new file mode 100644
index 00000000..a02b1ac5
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st
@@ -0,0 +1,15 @@
+tests-file library
+testCompileUnicodeString
+	| selector expected source |
+	selector := #stringMethod.
+	expected := String
+		with: (Character value: 16r1F1F3)
+		with: (Character value: 16r1F1F1).
+	source := GRPlatform current asMethodReturningString: expected named: selector.
+	[ 
+		| actual |
+		GRPlatform current compile: source into: self class classified: 'private'.
+		actual := self perform: selector.
+		self assert: expected = actual
+	] ensure: [ 
+		GRPlatform current removeSelector: #stringMethod from: self class ]
\ No newline at end of file