class RSpec::Matchers::BuiltIn::Compound

def does_not_match?(_actual)
  raise NotImplementedError, "`expect(...).not_to matcher.#{conjunction} matcher` " \
    "is not supported, since it creates a bit of an ambiguity. Instead, define negated versions " \
    "of whatever matchers you wish to negate with `RSpec::Matchers.define_negated_matcher` and " \
    "use `expect(...).to matcher.#{conjunction} matcher`."
end