private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig,
            com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig.Builder,
            com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfigOrBuilder>
        getMasterAuthorizedNetworksConfigFieldBuilder() {
      if (masterAuthorizedNetworksConfigBuilder_ == null) {
        masterAuthorizedNetworksConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig,
                com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig.Builder,
                com.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfigOrBuilder>(
                getMasterAuthorizedNetworksConfig(), getParentForChildren(), isClean());
        masterAuthorizedNetworksConfig_ = null;
      }
      return masterAuthorizedNetworksConfigBuilder_;
    }
<pre>
Optional. Master Authorized Network that supports multiple CIDR blocks.
Allows access to the k8s master from multiple blocks. It cannot be set at
the same time with the field man_block.
</pre>

<code>
.google.cloud.telcoautomation.v1alpha1.MasterAuthorizedNetworksConfig master_authorized_networks_config = 8 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/FullManagementConfig.java