# File lib/brakeman/checks/check_sql.rb, line 521
  def check_for_string_building exp
    return unless call? exp

    target = exp.target
    method = exp.method
    arg = exp.first_arg

    if STRING_METHODS.include? method
      check_str_target_or_arg(target, arg) or
      check_interp_target_or_arg(target, arg) or
      check_for_string_building(target) or
      check_for_string_building(arg)
    else
      nil
    end
  end