src/vs/workbench/api/common/extHostLanguageFeatures.ts/ExtHostLanguageFeatures/registerDocumentOnDropEditProvider
class ExtHostLanguageFeatures:	registerDocumentOnDropEditProvider(extension: IExtensionDescription, selector: vscode.DocumentSelector, provider: vscode.DocumentDropEditProvider) {
		const handle = this._nextHandle();
		this._adapter.set(handle, new AdapterData(new DocumentOnDropEditAdapter(this._proxy, this._documents, provider, handle), extension));
		this._proxy.$registerDocumentOnDropEditProvider(handle, this._transformDocumentSelector(selector));
		return this._createDisposable(handle);
	}