Get the number of unique files in manifest.

num_manifest_files(study_view)

Arguments

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.

Value

The number of unique files in manifest or 0 if the manifest is not in the `study_view`.