Get the number of documentation files in a study.
num_doc_files(study_view)
study_view | The file view for the study files. At minimum, the study_view is a dataframe or tibble with `metadataType` as a column name. Any `NA` in this column is assumed to be documentation files, all others are assumed to be metadata files. |
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The number of documentation files present in the `study_view`.