public java.lang.String getOutput() {
      java.lang.Object ref = output_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        output_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Optional. Contains stdout when code execution is successful, stderr or
other description otherwise.
</pre>

<code>string output = 2 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The output.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/CodeExecutionResult.java