src/vs/editor/contrib/snippet/browser/snippetParser.ts/SnippetParser/_parse
class SnippetParser:	private _parse(marker: Marker): boolean {
		return this._parseEscaped(marker)
			|| this._parseTabstopOrVariableName(marker)
			|| this._parseComplexPlaceholder(marker)
			|| this._parseComplexVariable(marker)
			|| this._parseAnything(marker);
	}