method BaseSource.prototype.onEventimport { BaseSource } from "https://deno.land/x/ddc_vim@v0.0.12/types.ts"; onEvent(_denops: Denops,_context: Context,_options: DdcOptions,_sourceOptions: SourceOptions,_sourceParams: Record<string, unknown>,): Promise<void>Parameters_denops: Denops_context: Context_options: DdcOptions_sourceOptions: SourceOptions_sourceParams: Record<string, unknown>ReturnsPromise<void>