class Shoulda::Matchers::ActiveModel::Qualifiers::IgnoreInterferenceByWriter

def invalid_argument_error(invalid_argument)
  ArgumentError.new(<<-ERROR)
gument: #{invalid_argument.inspect}.
nterference_by_writer takes one of three arguments:
, either :never or :always.
n, either true (which means always) or false (which means
ith a single key, :when, and a single value, which is either
 of a method or a Proc.
  ERROR
end