import { ParameterVariable } from "https://deno.land/x/deno_slack_sdk@1.2.0/parameters/mod.ts";
type
<P extends ParameterDefinition>() => ParameterVariableType<P>
namespace: string,
paramName: string,
definition: P,
import { ParameterVariable } from "https://deno.land/x/deno_slack_sdk@1.2.0/parameters/mod.ts";