This array defines things such as:
- name of the module & action to call to request data for this table
- optional filters information, eg. filter_limit and filter_offset
- etc.
The values are loaded:
- from the generic filters that are applied by default @see Piwik\API\DataTableGenericFilter::getGenericFiltersInformation()
- from the values already available in the GET array
- from the values set using methods from this class (eg. setSearchPattern(), setLimit(), etc.)