> var_dump( Wikibase\Repo\WikibaseRepo::getDefaultInstance()->getEntitySourceDefinitions() );
object(Wikibase\DataAccess\EntitySourceDefinitions)#603 (3) {
  ["sources":"Wikibase\DataAccess\EntitySourceDefinitions":private]=>
  array(1) {
    [0]=>
    object(Wikibase\DataAccess\EntitySource)#600 (7) {
      ["sourceName":"Wikibase\DataAccess\EntitySource":private]=>
      string(5) "local"
      ["databaseName":"Wikibase\DataAccess\EntitySource":private]=>
      bool(false)
      ["entityTypes":"Wikibase\DataAccess\EntitySource":private]=>
      array(3) {
        [0]=>
        string(4) "item"
        [1]=>
        string(8) "property"
        [2]=>
        string(6) "lexeme"
      }
      ["entityNamespaceIds":"Wikibase\DataAccess\EntitySource":private]=>
      array(3) {
        ["item"]=>
        int(0)
        ["property"]=>
        int(120)
        ["lexeme"]=>
        int(146)
      }
      ["entitySlots":"Wikibase\DataAccess\EntitySource":private]=>
      array(3) {
        ["item"]=>
        string(4) "main"
        ["property"]=>
        string(4) "main"
        ["lexeme"]=>
        string(4) "main"
      }
      ["conceptBaseUri":"Wikibase\DataAccess\EntitySource":private]=>
      string(31) "http://www.wikidata.org/entity/"
      ["interwikiPrefix":"Wikibase\DataAccess\EntitySource":private]=>
      string(0) ""
    }
  }
  ["entityTypeToSourceMapping":"Wikibase\DataAccess\EntitySourceDefinitions":private]=>
  NULL
  ["sourceToConceptBaseUriMap":"Wikibase\DataAccess\EntitySourceDefinitions":private]=>
  NULL
}

> var_dump( Wikibase\Repo\WikibaseRepo::getDefaultInstance()->getEntityNamespaceLookup()->getEntityNamespaces() );
array(3) {
  ["item"]=>
  int(0)
  ["property"]=>
  int(120)
  ["lexeme"]=>
  int(146)
}