Function Rf_xlengthgets 

pub unsafe fn Rf_xlengthgets(x: SEXP, newlen: R_xlen_t) -> SEXP

Set vector length (long vector version). Checked wrapper for Rf_xlengthgets. Calls Rf_xlengthgets_unchecked and routes through with_r_thread. Generated from source location line 2192, column 12. Generated from source file miniextendr-api/src/sys.rs.