public com.google.cloud.memorystore.v1.CrossInstanceReplicationConfig.RemoteInstanceOrBuilder
          getPrimaryInstanceOrBuilder() {
        if (primaryInstanceBuilder_ != null) {
          return primaryInstanceBuilder_.getMessageOrBuilder();
        } else {
          return primaryInstance_ == null
              ? com.google.cloud.memorystore.v1.CrossInstanceReplicationConfig.RemoteInstance
                  .getDefaultInstance()
              : primaryInstance_;
        }
      }
<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>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/CrossInstanceReplicationConfig.java