You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mixed_controller.rb
    path of file: ./repos/brakeman/test/apps/rails5/app/controllers
    
    the code of the file until where you have to start completion: class BaseController < Acti
    
  def another_early_return
    bank_name = params[:filename].first
    unless Statistics::AdminWithdrawal::BANK_LIST.include?(bank_name)
      flash[:alert] = 'Invalid filename'
      redirect_to :back
      return
    end