Function lv_table_get_cell_user_data 

pub unsafe extern "C" fn lv_table_get_cell_user_data(
    obj: *mut lv_obj_t,
    row: u16,
    col: u16,
) -> *mut c_void

Get custom user data to the cell. @param obj pointer to a Table object @param row id of the row [0 .. row_cnt -1] @param col id of the column [0 .. col_cnt -1]