class RSpec::Support::LooseSignatureVerifier

@private
practice, when this happens only the arity of the method is verified.
Allows matchers to be used instead of providing keyword arguments. In

def split_args(args) 

def split_args(args)
  if RSpec::Support.is_a_matcher?(args.last) && @signature.could_contain_kw_args?(args)
    args.pop
    @signature = SignatureWithKeywordArgumentsMatcher.new(@signature)
  end
  super(args)
end