public java.lang.String getNodeId() {
          java.lang.Object ref = nodeId_;
          if (!(ref instanceof java.lang.String)) {
            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
            java.lang.String s = bs.toStringUtf8();
            nodeId_ = s;
            return s;
          } else {
            return (java.lang.String) ref;
          }
        }
<pre>
The unqualified resource name. Should follow the `^[A-Za-z0-9_.~+%-]+$`
regex format. This is only specified when requesting a single node.
In case of multi-node requests, multi_node_params must be populated
instead. It's an error to specify both node_id and multi_node_params.
</pre>

<code>string node_id = 2;</code>

@return The nodeId.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java