This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP
sw_pfin_result flush(int uniqueid, const sw_datum * glyphname);
This call allows the module to remove a glyph or an entire font from the font cache. This is a highly unusual action, but may be required to allow module-specific configuration, that would change glyph generation, to produce consistent output.