This is an editor-level abstraction for the `BLO_library_temp_xxx()` API for temporary loading of data-blocks from another Blend file. It abstracts away the asset specific code, like asset file-path handling and local asset data-block handling. Main use-case for this is applying assets as presets that are based on data-blocks, like poses. Such preset assets are an important part of the asset system design, so such an abstraction will likely find more usage in the future.