Represents a form section.
Form sections have a title and description.
Objects of this class are created by
add_form_custom_area() method
the
Db_ActiveRecord class. Form area contents should be defined in
a partial with name _form_section_
id.htm in the controller's views directory,
where
id is an area identifier.
Specifies the area identifier.
Specifies a path to a directory containing the partial. Optional.