column (or relationship) accessor, and 'name' is the name of the column
accessor in the related table.
+B<NOTE:> You need to explicitly quote '+columns' when defining the attribute.
+Not doing so causes Perl to incorrectly interpret +columns as a bareword with a
+unary plus operator before it.
+
=head2 include_columns
=over 4
e.g. an C<ORDER BY> clause. This is done via the C<-as> B<select function
attribute> supplied as shown in the example above.
+B<NOTE:> You need to explicitly quote '+select'/'+as' when defining the attributes.
+Not doing so causes Perl to incorrectly interpret them as a bareword with a
+unary plus operator before it.
+
=head2 +select
=over 4