wrong_interface_segregation.rb

module Tools
  def valid_email? email
    # ...
  end
  
  def send_email(from, to, message)
    #
  end
  
  def log(priority, message)
    #
  end
  
  def select_random_element(an_array)
    #
  end
  
  def subgroup_in_pairs(an_array)
    #
  end
end