default T call(SourceSection source,T lhs,T argument1,T argument2){
  return call(source,lhs,Arrays.asList(argument(argument1),argument(argument2)));
}

default T call ( SourceSection source , T lhs , T argument1 , T argument2 ) { return call ( source , lhs , Arrays . asList ( argument ( argument1 ) , argument ( argument2 ) ) ) ; }
helper function : create a call with two unnamed arguments .
