src/vs/workbench/contrib/mergeEditor/browser/model/modifiedBaseRange.ts/ModifiedBaseRange/dumbCombineInputs
class ModifiedBaseRange:	private dumbCombineInputs(firstInput: 1 | 2): LineRangeEdit | undefined {
		if (firstInput === 1 && this.dumbInput1LineRangeEdit !== null) {
			return this.dumbInput1LineRangeEdit;
		} else if (firstInput === 2 && this.dumbInput2LineRangeEdit !== null) {
			return this.dumbInput2LineRangeEdit;
		}

		let input1Lines = this.input1Range.getLines(this.input1TextModel);
		let input2Lines = this.input2Range.getLines(this.input2TextModel);
		if (firstInput === 2) {
			[input1Lines, input2Lines] = [input2Lines, input1Lines];
		}

		const result = new LineRangeEdit(this.baseRange, input1Lines.concat(input2Lines));
		if (firstInput === 1) {
			this.dumbInput1LineRangeEdit = result;
		} else {
			this.dumbInput2LineRangeEdit = result;
		}
		return result;
	}