Get the file indices for `study_view` based on metadataType and return as list with file metadataType as name of the elements.
get_file_indices_named(study_view, meta_types)
| study_view | The file view for a study, with the columns 'file_data', where each element is a tibble with the data, and metadataType, where each element is the metadataType for the file. |
|---|---|
| meta_types | List of metadataTypes. |
Named list of indices from `study_view` for which the metadataType exists; `NULL` if none exist.