code: function (label) {
                      return {
                          type: 'ReturnStatement',
                          argument: {
                              type: 'UnaryExpression',
                              operator: 'void',
                              prefix: true,
                              argument: {
                                  type: 'CallExpression',
                                  callee: ident(label || symExit),
                                  arguments: []
                              }
                          }
                      };
                  }
docs: How to exit the loop