def self.signature(method_name, arg_arity, kwarg_arity)
return unless @signatures[method_name]
@signatures[method_name].each do |signature|
sig_arity = signature.args.size
return signature if sig_arity == arg_arity + kwarg_arity
next unless sig_arity < arg_arity + kwarg_arity
t_arg_arity, t_kwarg_arity = arg_arity, kwarg_arity
if sig_arity > t_arg_arity
t_kwarg_arity -= (sig_arity - t_arg_arity)
t_arg_arity = sig_arity
end
if (t_arg_arity == sig_arity || t_arg_arity > sig_arity && signature.var_args) &&
(t_kwarg_arity == 0 || t_kwarg_arity > 0 && signature.var_kwargs)
return signature
end
end
@signatures[method_name].first
end