Method _checkProposedApi

src/server/web/public/terminal.js:5952–5954

()

            }
          }
          _checkReadonlyOptions(e3) {
            if (l.includes(e3)) throw new Error(`Option "${e3}" can only be set in the constructor`);
          }
          _checkProposedApi() {
            if (!this._core.optionsService.rawOptions.allowProposedApi) throw new Error("You must set the allowProposedApi option to true to use proposed API");
          }