Counts the usage across all entities.
array $usage_data: Array of usage data returned from Entity Usage service.
int Returns the count of entity usage across all entities.
\Drupal\entity_usage\EntityUsageInterface::listSources()
function _paragraphs_library_count_usage(array $usage_data) {
$count = 0;
foreach ($usage_data as $entities) {
// We only want to register usages by different entities, ignoring usages
// accross revisions / translations / fields of the same entity.
$count += count($entities);
}
return $count;
}