code: public boolean containsEnvVariables(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      return internalGetEnvVariables().getMap().containsKey(key);
    }
docs: <pre>
  Environment variables available to the application.
  Only returned in `GET` requests if `view=FULL` is set.
  </pre>
  
  <code>map&lt;string, string&gt; env_variables = 104;</code>