src/vs/workbench/services/keybinding/common/keybindingEditing.ts/KeybindingsEditingService/applyEditsToBuffer
class KeybindingsEditingService:	private applyEditsToBuffer(edit: Edit, model: ITextModel): void {
		const startPosition = model.getPositionAt(edit.offset);
		const endPosition = model.getPositionAt(edit.offset + edit.length);
		const range = new Range(startPosition.lineNumber, startPosition.column, endPosition.lineNumber, endPosition.column);
		let currentText = model.getValueInRange(range);
		const editOperation = currentText ? EditOperation.replace(range, edit.content) : EditOperation.insert(startPosition, edit.content);
		model.pushEditOperations([new Selection(startPosition.lineNumber, startPosition.column, startPosition.lineNumber, startPosition.column)], [editOperation], () => []);
	}