code: public com.google.api.ChangeType getChangeType() {
      @SuppressWarnings("deprecation")
      com.google.api.ChangeType result = com.google.api.ChangeType.valueOf(changeType_);
      return result == null ? com.google.api.ChangeType.UNRECOGNIZED : result;
    }
docs: <pre>
  The type for this change, either ADDED, REMOVED, or MODIFIED.
  </pre>
  
  <code>.google.api.ChangeType change_type = 4;</code>