src/vs/base/common/stream.ts/WriteableStreamImpl/resume
class WriteableStreamImpl:	resume(): void {
		if (this.state.destroyed) {
			return;
		}

		if (!this.state.flowing) {
			this.state.flowing = true;

			// emit buffered events
			this.flowData();
			this.flowErrors();
			this.flowEnd();
		}
	}