Find which strings are valid PGS Catalog identifiers (returns TRUE).
Association IDs are tested against the following regular expression:
^PGS\\d{6}$.
is_pgs_id(str, convert_NA_to_FALSE = TRUE)A logical vector.
A character vector of strings.
Whether to treat NA as NA
(convert_NA_to_FALSE = FALSE) or whether to return FALSE when
an NA is found (convert_NA_to_FALSE = TRUE).