import { DataMapper } from "https://deno.land/x/deno_slack_data_mapper@2.6.1/data_mapper.ts";
Parameters
args: DataMapperExpressionCountArgs<Def> | RawExpression | SimpleExpression<Def>
Returns
Promise<CountResponse>
x/deno_slack_data_mapper/data_mapper.ts>DataMapper#countBy
import { DataMapper } from "https://deno.land/x/deno_slack_data_mapper@2.6.1/data_mapper.ts";