src/vs/workbench/contrib/output/common/outputChannelModel.ts/AbstractFileOutputChannelModel/appendToModel
class AbstractFileOutputChannelModel:	appendToModel(content: string): void {
		if (this.model && content) {
			const lastLine = this.model.getLineCount();
			const lastLineMaxColumn = this.model.getLineMaxColumn(lastLine);
			this.model.applyEdits([EditOperation.insert(new Position(lastLine, lastLineMaxColumn), content)]);
			this._onDidAppendedContent.fire();
		}
	}