src/vs/workbench/contrib/mergeEditor/browser/model/modifiedBaseRange.ts/ModifiedBaseRangeState/toggle
class ModifiedBaseRangeState:	public toggle(inputNumber: 1 | 2): ModifiedBaseRangeState {
		if (inputNumber === 1) {
			return this.withInput1(!this.input1);
		} else {
			return this.withInput2(!this.input2);
		}
	}