When we do a reflection update via API , what's default Refresh Method?(full update / Incremental update ?)

As above , what’s default reflection method when we post /reflction , can I specify the method ?

The “Refresh Method” is a property of the physical dataset (purple icons) on which the reflections depend. The default value is “Full Refresh”. You can change it via the API with a request to
PUT /catalog/{id} with a dataset object. In this object, the accelerationRefreshPolicy property is an acceleration refresh policy object:

  "refreshPeriodMs": Number,
  "gracePeriodMs": Number,
  "method": String ["FULL", "INCREMENTAL"],
  "refreshField": String [optional]