MessageListHeaderViewStyle
constructor( @ColorInt background: Int, titleTextStyle: TextStyle, offlineTextStyle: TextStyle, searchingForNetworkTextStyle: TextStyle, onlineTextStyle: TextStyle, showUserAvatar: Boolean, backButtonIcon: Drawable, showBackButton: Boolean, showBackButtonBadge: Boolean, @ColorInt backButtonBadgeBackgroundColor: Int, showSearchingForNetworkProgressBar: Boolean, searchingForNetworkProgressBarTint: ColorStateList, separatorBackgroundDrawable: Drawable?)