private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.memorystore.v1.PscAutoConnection,
              com.google.cloud.memorystore.v1.PscAutoConnection.Builder,
              com.google.cloud.memorystore.v1.PscAutoConnectionOrBuilder>
          getPscAutoConnectionFieldBuilder() {
        if (pscAutoConnectionBuilder_ == null) {
          if (!(connectionCase_ == 1)) {
            connection_ = com.google.cloud.memorystore.v1.PscAutoConnection.getDefaultInstance();
          }
          pscAutoConnectionBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.memorystore.v1.PscAutoConnection,
                  com.google.cloud.memorystore.v1.PscAutoConnection.Builder,
                  com.google.cloud.memorystore.v1.PscAutoConnectionOrBuilder>(
                  (com.google.cloud.memorystore.v1.PscAutoConnection) connection_,
                  getParentForChildren(),
                  isClean());
          connection_ = null;
        }
        connectionCase_ = 1;
        onChanged();
        return pscAutoConnectionBuilder_;
      }
<pre>
Immutable. Detailed information of a PSC connection that is created
through service connectivity automation.
</pre>

<code>
.google.cloud.memorystore.v1.PscAutoConnection psc_auto_connection = 1 [(.google.api.field_behavior) = IMMUTABLE];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/Instance.java