method cli.Command.prototype.hasEnvVarRe-exportimport { cli } from "https://deno.land/x/create_react_app@v0.1.2/deps.ts"; const { Command } = cli; 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