Function R_existsVarInFrame 

unsafe fn R_existsVarInFrame(rho: SEXP, symbol: SEXP) -> Rboolean

Check if a variable exists in an environment frame.

Does not search enclosing environments. Checked wrapper for R_existsVarInFrame. Calls R_existsVarInFrame_unchecked and routes through with_r_thread. Generated from source location line 3712, column 8. Generated from source file miniextendr-api/src/ffi.rs.