src/vs/editor/contrib/zoneWidget/browser/zoneWidget.ts/Arrow/show
class Arrow:	show(where: IPosition): void {

		if (where.column === 1) {
			// the arrow isn't pretty at column 1 and we need to push it out a little
			where = { lineNumber: where.lineNumber, column: 2 };
		}

		this._decorations.set([{
			range: Range.fromPositions(where),
			options: {
				description: 'zone-widget-arrow',
				className: this._ruleName,
				stickiness: TrackedRangeStickiness.NeverGrowsWhenTypingAtEdges
			}
		}]);
	}