src/vs/workbench/api/browser/mainThreadCustomEditors.ts/MainThreadCustomEditors/$registerCustomEditorProvider
class MainThreadCustomEditors:	public $registerCustomEditorProvider(extensionData: extHostProtocol.WebviewExtensionDescription, viewType: string, options: extHostProtocol.IWebviewPanelOptions, supportsMultipleEditorsPerDocument: boolean, serializeBuffersForPostMessage: boolean): void {
		this.registerEditorProvider(CustomEditorModelType.Custom, reviveWebviewExtension(extensionData), viewType, options, {}, supportsMultipleEditorsPerDocument, serializeBuffersForPostMessage);
	}