method Command.prototype.getEnvVarimport { Command } from "https://dotland.deno.dev/x/cliffy@v0.11.0/command.ts"; getEnvVar(name: string, hidden?: boolean): IEnvVariable | undefinedGet environment variable with given name. Parametersname: stringName of the environment variable. optionalhidden: booleanInclude hidden environment variable. ReturnsIEnvVariable | undefined