src/vs/workbench/contrib/mergeEditor/browser/model/mergeEditorModel.ts/MergeEditorModel/manuallySolvedConflictCountThatEqualInput1
class MergeEditorModel:	public get manuallySolvedConflictCountThatEqualInput1(): number {
		return arrayCount(
			this.modifiedBaseRangeResultStates.get().entries(),
			([r, s]: [ModifiedBaseRange, ModifiedBaseRangeData]) => {
				const state = s.accepted.get();
				return r.isConflicting && s.computedFromDiffing && state.kind === ModifiedBaseRangeStateKind.input1;
			}
		);
	}