add_tfilter

Appends a new tfilter and associated information to the setting.

The given tfilter is duplicated internally and is not changed by this function. If an identical tfilter (considering attributes as well) already exists, the tfilter is not added and the function returns false.

Parameters:

this	the SettingTCConfig
tfilter	the tfilter to add

Returns:

true if the tfilter was added; false if the tfilter was already known.