src/vs/workbench/api/common/extHostLanguageFeatures.ts/ExtHostLanguageFeatures/$provideDefinition
class ExtHostLanguageFeatures:	$provideDefinition(handle: number, resource: UriComponents, position: IPosition, token: CancellationToken): Promise<modes.LocationLink[]> {
		return this._withAdapter(handle, DefinitionAdapter, adapter => adapter.provideDefinition(URI.revive(resource), position, token), []);
	}