get_cached_asdf_extension_list

asdf.extension.get_cached_asdf_extension_list(extensions)[source]

Get a previously created AsdfExtensionList for the specified extensions, or create and cache one if necessary. Building the type index is expensive, so it helps performance to reuse the index when possible.

Parameters:
extensionslist of asdf.extension.AsdfExtension
Returns:
asdf.extension.AsdfExtensionList