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We have a lot of frighteningly similar theme functions that only output links, but links don't even need to be run through the theme layer. For more information on what should and what shouldn't be output / overridable via the theme system.
theme_more_help_link theme_book_title_link theme_link theme_pager_link theme_pager_first theme_pager_last theme_pager_next theme_pager_previous
@TODO - use route name and parameters instead of system path