Implementing classes must provide this method.
return : 1 / undef
1 -> this path is not a development directory as far as this heuristic is concerned
undef -> this path is a development directory as far as this heuristic is concerned
args : ( $class , $result_object )
$class -> method will be invoked on packages, not objects
$result_object -> will be a Path::IsDev::Result
Additionally, consuming classes <B>shouldB> set $result_object->result( undef ) prior to returning true.
Composing roles <B>shouldB> also invoke $result_object->add_reason( $self, $result_value, $descriptive_reason_for_result, \%contextinfo ).
See Path::IsDev::Result for details