Facet wp index level category

gistfile1.txt

function index_top_level_terms( $params, $class ) { 
if ( 'univers' == $params['facet_name'] ) { 
if ( 0 < $params['depth'] ) { 
return false; // don't index child terms 
} 
} 

if ( 'familles' == $params['facet_name'] ) { 
if (( 0 == $params['depth'] ) || ( 2 == $params['depth'] )) { 
return false; // index level 2 terms 
} 
} 
return $params; 
} 
add_filter( 'facetwp_index_row', 'index_top_level_terms', 10, 2 );