Function SETLEVELS 

pub unsafe fn SETLEVELS(x: SEXP, v: c_int) -> c_int

Set the LEVELS field (for factors).

Returns the value that was set. Checked wrapper for SETLEVELS. Calls SETLEVELS_unchecked and routes through with_r_thread. Generated from source location line 650, column 12. Generated from source file miniextendr-api/src/sys.rs.