src/vs/editor/contrib/bracketMatching/browser/bracketMatching.ts/BracketMatchingController/_updateBrackets
class BracketMatchingController:	private _updateBrackets(): void {
		if (this._matchBrackets === 'never') {
			return;
		}
		this._recomputeBrackets();

		let newDecorations: IModelDeltaDecoration[] = [], newDecorationsLen = 0;
		for (const bracketData of this._lastBracketsData) {
			let brackets = bracketData.brackets;
			if (brackets) {
				newDecorations[newDecorationsLen++] = { range: brackets[0], options: bracketData.options };
				newDecorations[newDecorationsLen++] = { range: brackets[1], options: bracketData.options };
			}
		}

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