@java.lang.Override
      public java.lang.String getEnvOrThrow(java.lang.String key) {
        if (key == null) {
          throw new NullPointerException("map key");
        }
        java.util.Map<java.lang.String, java.lang.String> map = internalGetEnv().getMap();
        if (!map.containsKey(key)) {
          throw new java.lang.IllegalArgumentException();
        }
        return map.get(key);
      }
<pre>
Optional. Environment variables passed to the container's entrypoint.
</pre>

<code>map&lt;string, string&gt; env = 4 [(.google.api.field_behavior) = OPTIONAL];</code>
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java