def plugin_is_added_as_dependency?(plugin_name)
      UI.user_error!("fastlane plugins must start with '#{self.class.plugin_prefix}' string") unless plugin_name.start_with?(self.class.plugin_prefix)
      return available_plugins.include?(plugin_name)
    end
def plugin_is_added_as_dependency?(plugin_name)
      UI.user_error!("fastlane plugins must start with '#{self.class.plugin_prefix}' string") unless plugin_name.start_with?(self.class.plugin_prefix)
      return available_plugins.include?(plugin_name)
    end
Check if a plugin is added as dependency to either the
 Gemfile or the Pluginfile