Function fexpr_get_fmpz_mpoly_q 

pub unsafe extern "C" fn fexpr_get_fmpz_mpoly_q(
    res: *mut fmpz_mpoly_q_struct,
    expr: *const fexpr_struct,
    vars: *const fexpr_vec_struct,
    ctx: *const fmpz_mpoly_ctx_struct,
) -> c_int