# File lib/brakeman/checks/check_sql.rb, line 333
  def check_joins_arguments arg
    return unless sexp? arg and not node_type? arg, :hash, :string, :str

    if array? arg
      arg.each do |a|
        unsafe_arg = check_joins_arguments a
        return unsafe_arg if unsafe_arg
      end

      nil
    else
      unsafe_sql? arg
    end
  end