Function R_WeakRefValue 

pub unsafe fn R_WeakRefValue(w: SEXP) -> SEXP

Get the value from a weak reference. Checked wrapper for R_WeakRefValue. Calls R_WeakRefValue_unchecked and routes through with_r_thread. Generated from source location line 2234, column 12. Generated from source file miniextendr-api/src/sys.rs.