This method creates an instance of the calling class setting the MODE_BEGIN mode. Any item between
Selectable::begin and [[end()]] which match the filter attribute, will be selectable.
It will apply the configuration
to the created instance. A matching [[end()]] call should be called later.
As some widgets may use output buffering, the [[end()]] call should be made in the same view
to avoid breaking the nesting of output buffers.