import { type CustomTypeParameterDefinition } from "https://deno.land/x/deno_slack_sdk@1.4.0/parameters/types.ts";
definition: Omit<BaseParameterDefinition<AllValues>, "type"> & { type: ICustomType; }
x/deno_slack_sdk/parameters/types.ts>CustomTypeParameterDefinition
import { type CustomTypeParameterDefinition } from "https://deno.land/x/deno_slack_sdk@1.4.0/parameters/types.ts";