src/vs/editor/common/core/range.ts/Range/equalsRange
class Range:	public static equalsRange(a: IRange | null, b: IRange | null): boolean {
		return (
			!!a &&
			!!b &&
			a.startLineNumber === b.startLineNumber &&
			a.startColumn === b.startColumn &&
			a.endLineNumber === b.endLineNumber &&
			a.endColumn === b.endColumn
		);
	}