anchor.diff:      IMPORT_ELEM;
       IMPORT_ALIAS;
       INIT_EXPR;
  -    INLINE_METHOD_ARG;
  -    INLINE_ARG_LIST;
       INTERFACE_DECL;
       INTERFACE_BODY;
       MEMBER_DECL;
  
positive.code: 
  functionalArguments
      : functionalArgument+
      -> ^(INLINE_ARG_LIST functionalArgument+)
      ;
  
  arguments
  
negative.code: //invocation
  functionalArgument
      : parameterName functionalArgumentDefinition
      -> ^(NAMED_ARG parameterName ^(METHOD_ARG 'local' parameterName functionalArgumentDefinition))
      ;
  
  functionalArgumentDefinition
      : functionalArgumentParameters functionalArgumentBody
      ;
  
  functionalArgumentParameters
      : (formalParametersStart) => formalParameters //-> formalParameters 
      | -> ^(PARAM_LIST)
      ;
  
  functionalArgumentBody
      : block //-> block
      | parExpression -> ^(BLOCK ^(DIRECTIVE ^(RETURN parExpression)))
      ;
  
  //Support "T x in arg" in positional argument lists
  