Can't set maxNativeZoom for the tile layer in config

[benjaminh]

OpenStreetMap restricts the zoom level to 20 so I need to use Leaflet maxZoom and maxNativeZoom to zoom into last level tiles.
Yet, I didn't find in django-leaflet config a corresponding MAX_NATIVE_ZOOM property to set in LEAFLET_CONFIG.

Is there any way to set this value ? If not, is it possible to set the leaflet property by accessing to the object in the main_map_init javascript() function ?