visits any type mirror as if by passing itself to that type mirror 's typemirror #accept accept method and passing null for the additional parameter . the invocation v.visit t is equivalent to t.accept v , null . concode_field_sep PlaceHolder placeHolder concode_field_sep R visitUnion concode_elem_sep R visitIntersection concode_elem_sep R visitUnknown
R function ( TypeMirror arg0 ) { return arg0 . accept ( this , null ) ; }