public boolean hasPrimaryInstance() {
        return ((bitField0_ & 0x00000001) != 0);
      }
<pre>
Output only. The primary instance that acts as the source of replication
for the secondary instances.
</pre>

<code>
.google.cloud.memorystore.v1.CrossInstanceReplicationConfig.RemoteInstance primary_instance = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return Whether the primaryInstance field is set.
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/CrossInstanceReplicationConfig.java