fn find_storage_target(
arena: &[DebugNode],
current_node_index: usize,
current_step: usize,
slot: U256,
space: StorageSpace,
) -> Option<StorageTarget>fn find_storage_target(
arena: &[DebugNode],
current_node_index: usize,
current_step: usize,
slot: U256,
space: StorageSpace,
) -> Option<StorageTarget>