private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vmwareengine.v1.NetworkPolicy,
            com.google.cloud.vmwareengine.v1.NetworkPolicy.Builder,
            com.google.cloud.vmwareengine.v1.NetworkPolicyOrBuilder>
        getNetworkPolicyFieldBuilder() {
      if (networkPolicyBuilder_ == null) {
        networkPolicyBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vmwareengine.v1.NetworkPolicy,
                com.google.cloud.vmwareengine.v1.NetworkPolicy.Builder,
                com.google.cloud.vmwareengine.v1.NetworkPolicyOrBuilder>(
                getNetworkPolicy(), getParentForChildren(), isClean());
        networkPolicy_ = null;
      }
      return networkPolicyBuilder_;
    }
<pre>
Required. The network policy configuration to use in the request.
</pre>

<code>
.google.cloud.vmwareengine.v1.NetworkPolicy network_policy = 3 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/CreateNetworkPolicyRequest.java