method Dpp.prototype.extActionimport { Dpp } from "https://deno.land/x/dpp_vim@v1.0.0/dpp.ts"; extAction(denops: Denops,context: Context,options: DppOptions,extName: ExtName,actionName: ActionName,actionParams?: unknown,): Promise<unknown | undefined>Parametersdenops: Denopscontext: Contextoptions: DppOptionsextName: ExtNameactionName: ActionNameoptionalactionParams: unknown = [UNSUPPORTED]ReturnsPromise<unknown | undefined>