src/vs/editor/contrib/find/findDecorations.ts/FindDecorations/getFindScope
class FindDecorations:	public getFindScope(): Range | null {
		if (this._findScopeDecorationIds[0]) {
			return this._editor.getModel().getDecorationRange(this._findScopeDecorationIds[0]);
		}
		return null;
	}