Methods:
Registers a new custom metric which can be used as an evaluation metric for the trained model.
GETdescribeCustomMetricRetrieves a full description of a previously registered custom metric function.
PATCHupdateCustomMetricUpdates a previously registered custom metric with a new function implementation.
DELETEdeleteCustomMetricDeletes a previously registered custom metric.
GETdescribeCustomMetricVersionDescribes a given custom metric version
GETlistCustomMetricsRetrieves a list of registered custom metrics.