public com.google.protobuf.ByteString getRequiredBytes(int index) {
      return required_.getByteString(index);
    }
<pre>
Optional. Required properties of Type.OBJECT.
</pre>

<code>repeated string required = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@param index The index of the value to return.
@return The bytes of the required at the given index.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Schema.java