code: func (v Vars) WithoutWildcards() Vars {
  	n := Vars{}
  	for k, v := range v {
  		if ast.Var(k).IsWildcard() || ast.Var(k).IsGenerated() {
  			continue
  		}
  		n[k] = v
  	}
  	return n
  }
docs: // WithoutWildcards returns a copy of v with wildcard variables removed.