I am not a physicist, but... Does the matter/antimatter distinction have any relevance to black holes? I though that they erased all features of the mass that

I am not a physicist, but... Does the matter/antimatter distinction have any relevance to black holes? I though that they erased all features of the mass that they swallowed. What does it mean for an object to be composed "mainly of antimatter" as opposed to "completely of antimatter"? Surely an object that is "mainly antimatter" will rapidly turn into an object that is entirely antimatter plus some photons.