public com.google.cloud.vertexai.api.SchemaOrBuilder getItemsOrBuilder() {
      if (itemsBuilder_ != null) {
        return itemsBuilder_.getMessageOrBuilder();
      } else {
        return items_ == null ? com.google.cloud.vertexai.api.Schema.getDefaultInstance() : items_;
      }
    }
<pre>
Optional. SCHEMA FIELDS FOR TYPE ARRAY
Schema of the elements of Type.ARRAY.
</pre>

<code>.google.cloud.vertexai.v1.Schema items = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Schema.java