void set_null(size_t index) override
 {
     REALM_ASSERT(m_nullable);
     if (!m_array->is_inner_bptree_node()) {
         static_cast<BasicArray<T>*>(m_array.get())->set(index, null::get_null_float<T>()); // Throws
         return;
     }
     SetLeafElem set_leaf_elem(m_array->get_alloc(), null::get_null_float<T>());
     m_array->update_bptree_elem(index, set_leaf_elem); // Throws
 }
void BasicColumn<T>::set(std::size_t ndx, T value)
{
    if (!m_array->is_inner_bptree_node()) {
        static_cast<BasicArray<T>*>(m_array)->set(ndx, value); // Throws
        return;
    }

    SetLeafElem set_leaf_elem(m_array->get_alloc(), value);
    m_array->update_bptree_elem(ndx, set_leaf_elem); // Throws
}