Method label_offset_from_base

Returns offset of a label by it's `label_id` relative to the base offset. \attention The passed `label_id` must be valid as it's used as an index to `_label_entries[]` array. In debug builds the array access uses an assertion, but such assertion is not present in release builds. To get whether a label is valid, check out \ref CodeHolder::is_label_valid() function. \note The offset of the section