@@ -358,10 +358,28 @@
 					   andSelector: _cmd];
 }
 
 - replaceOccurrencesOfString: (OFString*)str
 		  withString: (OFString*)repl
+{
+	@throw [OFNotImplementedException newWithClass: isa
+					   andSelector: _cmd];
+}
+
+- removeLeadingWhitespaces
+{
+	@throw [OFNotImplementedException newWithClass: isa
+					   andSelector: _cmd];
+}
+
+- removeTrailingWhitespaces
+{
+	@throw [OFNotImplementedException newWithClass: isa
+					   andSelector: _cmd];
+}
+
+- removeLeadingAndTrailingWhitespaces
 {
 	@throw [OFNotImplementedException newWithClass: isa
 					   andSelector: _cmd];
 }