Function lv_cache_entry_get_node_size 

pub unsafe extern "C" fn lv_cache_entry_get_node_size(
    entry: *mut lv_cache_entry_t,
) -> u32

Get the node size of a cache entry. Which is the same size with lv_cache_entry_get_size()’s node_size parameter. @param entry The cache entry to get the node size of. @return The node size of the cache entry.