rem: static status_t Get(BAppFileInfo &info, SignatureValue &value)
add: static status_t Get(BAppFileInfo &info, TypeValue &value)
context: 	static status_t Get(BAppFileInfo &info, SignatureValue &value)	{		char buffer[B_MIME_TYPE_LENGTH];		status_t error = info.GetSignature(buffer);		if (error == B_OK)			value.type = buffer;		return error;	}