isWithMention

Check, that TextedContent.textSources contains:

• Any dev.inmo.tgbotapi.types.message.textsources.MentionTextSource with dev.inmo.tgbotapi.types.message.textsources.MentionTextSource.username equal to username

• Any dev.inmo.tgbotapi.types.message.textsources.TextMentionTextSource with dev.inmo.tgbotapi.types.message.textsources.TextMentionTextSource.user with the same username

Uses isWithMention with user (is presented) or isWithTextMention with user to determine user mentioning in this