class WebConsole::Session

storage.
Can return nil, if no binding or exception have been preserved in the

:__web_console_binding and the exception in :__web_console_exception.
The storage is expected to respond to #[]. The binding is expected in

Create a Session from an binding or exception in a storage.

def from(storage)
  if exc = storage[:__web_console_exception]
    new(ExceptionMapper.follow(exc))
  elsif binding = storage[:__web_console_binding]
    new([[binding]])
  end
end