def _op_def(self, op_name):
    return op_def_registry.get(op_name)

  def visit_block(self, block):
    return [self.visit(item) for item in block]

  def visit_Pass(self, node):
    if self.symbol_table.in_scf_scope():
      self._emit_with_loc('\nscf.yield', node)
    else:
      self._emit_with_loc('\ntfr.return', node)

  def visit_Attribute(self, node):

        this.simpleNameToFQN = simpleNameToFQN;
    }

    @Override
    public void startResolving(ClassNode node, SourceUnit source) {
        this.source = source;
        visitClass(node);
    }

    @Override
    protected void visitConstructorOrMethod(MethodNode node, boolean isConstructor) {
        VariableScope oldScope = currentScope;
        currentScope = node.getVariableScope();

      }

      @Override
      void visitParameterizedType(ParameterizedType t) {
        builder.add((Class<?>) t.getRawType());
      }

      @Override
      void visitClass(Class<?> t) {
        builder.add(t);
      }

      @Override
      void visitGenericArrayType(GenericArrayType t) {
        builder.add(Types.getArrayClass(of(t.getGenericComponentType()).getRawType()));

      }

      @Override
      void visitParameterizedType(ParameterizedType t) {
        builder.add((Class<?>) t.getRawType());
      }

      @Override
      void visitClass(Class<?> t) {
        builder.add(t);
      }

      @Override
      void visitGenericArrayType(GenericArrayType t) {
        builder.add(Types.getArrayClass(of(t.getGenericComponentType()).getRawType()));