Model metadata specific to image object detection.
Output only. The number of nodes this model is deployed on. A
node is an abstraction of a machine resource, which can handle
online prediction QPS as given in the qps_per_node field.
Output only. The reason that this create model operation
stopped, e.g. BUDGET_REACHED, MODEL_CONVERGED.
Output only. The actual train cost of creating this model,
expressed in milli node hours, i.e. 1,000 value in this field
means 1 node hour. Guaranteed to not exceed the train budget.