src/vs/workbench/contrib/preferences/browser/keybindingsEditorContribution.ts/KeybindingEditorDecorationsRenderer/_updateDecorationsNow
class KeybindingEditorDecorationsRenderer:	private _updateDecorationsNow(): void {
		const model = assertIsDefined(this._editor.getModel());

		const newDecorations: IModelDeltaDecoration[] = [];

		const root = parseTree(model.getValue());
		if (root && Array.isArray(root.children)) {
			for (let i = 0, len = root.children.length; i < len; i++) {
				const entry = root.children[i];
				const dec = this._getDecorationForEntry(model, entry);
				if (dec !== null) {
					newDecorations.push(dec);
				}
			}
		}

		this._dec = this._editor.deltaDecorations(this._dec, newDecorations);
	}