Function get_all_property_names 

pub unsafe fn get_all_property_names(
    env: Env,
    object: Value,
    key_mode: KeyCollectionMode,
    key_filter: KeyFilter,
    key_conversion: KeyConversion,
    result: *mut Value,
) -> Result<(), Status>

Available on crate feature napi-6 only.

napi_get_all_property_names