Example of a module that expects the classes including it to have certain methods implemented

loginable.rb

# typed: true

class AdminLogin
  include Loginable

  def email
    '[email protected]'
  end
end

module Loginable
  include Kernel

  def log_in!(password)
    puts <<~MSG
      logging in:
        email: #{email}
        password: #{password}
    MSG
  end
  
  # sometimes I do this
  # but not all circumstances make sense
  #
  # def email
  #  raise NotImplementedError
  # end
  
  # this is a hack to make it pass
  # but is annoying if you don't own the method signature
  #
  # def email
  #   super
  # end
end

sorbet.out

editor.rb:17: Method email does not exist on Loginable https://srb.help/7003
    17 |        email: #{email}
                         ^^^^^
    https://github.com/sorbet/sorbet/tree/90c20f728c528aa4a1a3dc1a137e4c9eae95716d/rbi/core/kernel.rbi#L96: Did you mean: Kernel#eval?
    96 |  def eval(arg0, arg1=T.unsafe(nil), filename=T.unsafe(nil), lineno=T.unsafe(nil)); end
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Errors: 1