src/vs/workbench/api/common/extHostLanguageFeatures.ts/ExtHostLanguageFeatures/registerOnTypeFormattingEditProvider
class ExtHostLanguageFeatures:	registerOnTypeFormattingEditProvider(extension: IExtensionDescription, selector: vscode.DocumentSelector, provider: vscode.OnTypeFormattingEditProvider, triggerCharacters: string[]): vscode.Disposable {
		const handle = this._addNewAdapter(new OnTypeFormattingAdapter(this._documents, provider), extension);
		this._proxy.$registerOnTypeFormattingSupport(handle, this._transformDocumentSelector(selector), triggerCharacters, extension.identifier);
		return this._createDisposable(handle);
	}