docs: public void visitEnumConstantDef(GroovySourceAST t,int visit) {
          GroovySourceAST sibling = (GroovySourceAST)t.getNextSibling();
          if (sibling != null && sibling.getType() == GroovyTokenTypes.ENUM_CONSTANT_DEF) {
              print(t,visit,null,null,", ");
          }
      }