An ExtendedParserContext captures the context in which source text is parsed with knowledge of the Concrete SYntax classes
that are in use.
A derived context is constructed with the relevant context, then createBaseResource
creates a Concrete Syntax resource for a Concrete Syntax expression string. Then parse creates
a corresponding Abstract Syntax ExpressionInOCL. initialize is invoked during the parse to
install the derived context into the ExpressionInOCL.
Interface is not intended to be implemented by clients.
This interface is not intended to be implemented by clients.