src/vs/workbench/contrib/output/common/outputChannelModel.ts/FileOutputChannelModel/updateModel
class FileOutputChannelModel:	protected override updateModel(): void {
		if (this.model) {
			this.fileService.readFile(this.file, { position: this.endOffset })
				.then(content => {
					this.etag = content.etag;
					if (content.value) {
						this.endOffset = this.endOffset + content.value.byteLength;
						this.appendToModel(content.value.toString());
					}
					this.updateInProgress = false;
				}, () => this.updateInProgress = false);
		} else {
			this.updateInProgress = false;
		}
	}