如題：case "sync":                 fn = new Function(                    this.args(),                    '"use strict";\n' +                        this.header() +                        this.content({                             onError: err => `throw ${err};\n`,                             onResult: result => `return ${result};\n`,                             onDone: () => "",                             rethrowIfPossible: true                         })                 );                break;