DBKV.delete_by_max_key

You're seeing just the function delete_by_max_key, go back to DBKV module for more information.
Link to this function

delete_by_max_key(table, max_key, inclusive \\ true)

View Source

Specs

delete_by_max_key(t(), any(), boolean()) :: integer() | {:error, any()}

Delete all entries from table where the key is less than or equal to max_key. The boundary can be excluded by setting inclusive to false.