public com.google.cloud.vmwareengine.v1.NodeTypeConfig.Builder
          putNodeTypeConfigsBuilderIfAbsent(java.lang.String key) {
        java.util.Map<java.lang.String, com.google.cloud.vmwareengine.v1.NodeTypeConfigOrBuilder>
            builderMap = internalGetMutableNodeTypeConfigs().ensureBuilderMap();
        com.google.cloud.vmwareengine.v1.NodeTypeConfigOrBuilder entry = builderMap.get(key);
        if (entry == null) {
          entry = com.google.cloud.vmwareengine.v1.NodeTypeConfig.newBuilder();
          builderMap.put(key, entry);
        }
        if (entry instanceof com.google.cloud.vmwareengine.v1.NodeTypeConfig) {
          entry = ((com.google.cloud.vmwareengine.v1.NodeTypeConfig) entry).toBuilder();
          builderMap.put(key, entry);
        }
        return (com.google.cloud.vmwareengine.v1.NodeTypeConfig.Builder) entry;
      }
<pre>
Required. The map of cluster node types in this cluster, where the key is
canonical identifier of the node type (corresponds to the `NodeType`).
</pre>

<code>
map&lt;string, .google.cloud.vmwareengine.v1.NodeTypeConfig&gt; node_type_configs = 7 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/PrivateCloud.java