/**
  * @see parser.IDLParserVisitor#visit(ASTexport, Object)
  * @param data expected is: an Instance of BuildInfo
  */
 public Object visit(ASTexport node, Object data) {
     // <export> ::= <type_dcl> | <const_dcl> | <except_dcl> | <attr_dcl> | <op_dcl>
     // let the children add themself to the type in creation
     node.childrenAccept(this, data);
     return null;
 }