private void ensureConnectionsIsMutable() {
        if (!((bitField0_ & 0x00000001) != 0)) {
          connections_ =
              new java.util.ArrayList<com.google.cloud.memorystore.v1.Instance.ConnectionDetail>(
                  connections_);
          bitField0_ |= 0x00000001;
        }
      }
<pre>
InstanceEndpoint consists of PSC connections that are created
as a group in each VPC network for accessing the instance. In each group,
there shall be one connection for each service attachment in the cluster.
</pre>

Protobuf type {@code google.cloud.memorystore.v1.Instance.InstanceEndpoint}
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java