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Additional non-API entry points added to those reported by ‘R CMD check’: ‘IS_LONG_VEC’, ‘PRCODE’, ‘PRENV’, ‘PRVALUE’, ‘R_nchar’, ‘Rf_NonNullStringMatch’, ‘R_shallow_duplicate_attr’, ‘Rf_StringBlank’, ‘SET_TYPEOF’, ‘TRUELENGTH’, ‘XLENGTH_EX’, and ‘XTRUELENGTH’.