src/vs/editor/contrib/inlayHints/inlayHintsController.ts/InlayHintsController/_removeAllDecorations
class InlayHintsController:	private _removeAllDecorations(): void {
		this._decorationIds = this._editor.deltaDecorations(this._decorationIds, []);
		this._decorationsTypeIds.forEach(this._codeEditorService.removeDecorationType, this._codeEditorService);
		this._decorationsTypeIds = [];
	}