launchMessages function
Toggles the visibility state of the messages modal.
This function calls updateIsMessagesModalVisible with the negated value of
isMessagesModalVisible to toggle the modal's visibility.
Example:
final options = LaunchMessagesOptions(
  updateIsMessagesModalVisible: (visible) => print("Messages modal visibility: $visible"),
  isMessagesModalVisible: false,
);
launchMessages(options);
// This will open the messages modal if it's currently closed, or close it if it's open.
Implementation
void launchMessages(LaunchMessagesOptions options) {
  options.updateIsMessagesModalVisible(!options.isMessagesModalVisible);
}