_expr.generate(out);
_expr.generateValue(out);
  protected void generateImpl(PhpWriter out)    throws IOException  {    // the "if" test handles Java's issue with trailing statements        if (_expr != null) {      out.print("return ");      // php/3a5h      _expr.generate(out);            /**      Expr copy = _expr.createCopy();      if (_expr instanceof VarExpr)	copy.generateReturn(out);      else	copy.generate(out);      */            out.println(";");    }    else      out.print("return NullValue.NULL;");  }