1. DomName('StorageQuota.requestPersistentQuota')
  2. DocsEditable()
  3. Experimental()
Future requestPersistentQuota(int newQuota)

Source 

@DomName('StorageQuota.requestPersistentQuota')
@DocsEditable()
@Experimental() // untriaged
Future requestPersistentQuota(int newQuota) => wrap_jso(_blink.BlinkStorageQuota.instance.requestPersistentQuota_Callback_1_(unwrap_jso(this), newQuota));