add method
Implementation
void add(Expr a, {ConstVar? constant}) {
if (constant != null) {
_c._z3.solver_assert_and_track(
_solver,
_c._createAST(a),
_c._createAST(constant),
);
} else {
_c._z3.solver_assert(_solver, _c._createAST(a));
}
}