method Command.prototype.hasEnvVarimport { Command } from "https://deno.land/x/ndeno@v2.0.6/src/deps.ts"; hasEnvVar(name: string, hidden?: boolean): booleanChecks whether the command has an environment variable with given name or not. Parametersname: stringName of the environment variable. optionalhidden: booleanInclude hidden environment variable. Returnsboolean