method Command.prototype.getGlobalEnvVarRe-exportimport { Command } from "https://deno.land/x/deno_books@v1.4.0/deps.ts"; getGlobalEnvVar(name: string, hidden?: boolean): EnvVar | undefinedGet global environment variable by name. Parametersname: stringName of the environment variable. optionalhidden: booleanInclude hidden environment variable. ReturnsEnvVar | undefined