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A missing term element of term_rcrd type.
term_rcrd
NA_term_rcrd_
An object of class term_rcrd (inherits from vctrs_rcrd, vctrs_vctr) of length 1.
vctrs_rcrd
vctrs_vctr
term-vector()
is_term_rcrd(NA_term_) is.na(NA_term_)
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