=head2 add_fk_index
Create an index for each foreign key.
-It defaults to enabled because this is a sensible default which accelerates most rdbms.
+Enabled by default, as having indexed foreign key columns is normally the
+sensible thing to do.
=head2 sources
=item Arguments: @classes
=back
-
-To explicitly specify which ResultSources should be parsed.
+
+Limit the amount of parsed sources by supplying an explicit list of source names.
=head1 SEE ALSO