OpenSSL::SSL::SSLSocket#check_nonblock

# File tmp/rubies/ruby-4.1.0-preview1/ext/openssl/lib/openssl/ssl.rb, line 411
        def check_nonblock(ret)
  if :wait_readable == ret
    raise SSLErrorWaitReadable, "read would block"
  elsif :wait_writable == ret
    raise SSLErrorWaitWritable, "write would block"
  else
    ret
  end
end