public java.lang.String getNetworkPeeringId() {
      java.lang.Object ref = networkPeeringId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        networkPeeringId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Required. The user-provided identifier of the new `NetworkPeering`.
This identifier must be unique among `NetworkPeering` resources within the
parent and becomes the final token in the name URI.
The identifier must meet the following requirements:

* Only contains 1-63 alphanumeric characters and hyphens
* Begins with an alphabetical character
* Ends with a non-hyphen character
* Not formatted as a UUID
* Complies with [RFC 1034](https://datatracker.ietf.org/doc/html/rfc1034)
(section 3.5)
</pre>

<code>string network_peering_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return The networkPeeringId.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/CreateNetworkPeeringRequest.java