Get all datalayers with Python

In my scene i have few datalayers.
I can access datalayer by its label

datalayer_editor_system = unreal.get_editor_subsystem(unreal.DataLayerEditorSubsystem)
layer=unreal.Name.cast('Restaurant')
mylayer=datalayer_editor_system.get_data_layer_from_label(layer)

But how to get ALL datalayers (if i don’t know its names) to i.e. array of datalayers, and then work with this array?