src/vs/editor/browser/config/charWidthReader.ts/DomCharWidthReader/read
class DomCharWidthReader:	public read(): void {
		// Create a test container with all these test elements
		this._createDomElements();

		// Add the container to the DOM
		document.body.appendChild(this._container!);

		// Read character widths
		this._readFromDomElements();

		// Remove the container from the DOM
		document.body.removeChild(this._container!);

		this._container = null;
		this._testElements = null;
	}