@java.lang.Override
  public com.google.protobuf.ByteString getMasterIpv4CidrBlockBytes() {
    java.lang.Object ref = masterIpv4CidrBlock_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      masterIpv4CidrBlock_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
Optional. The /28 network that the masters will use. It should be free
within the network.
</pre>

<code>string master_ipv4_cidr_block = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for masterIpv4CidrBlock.
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/StandardManagementConfig.java