u.node(node.Results)
		}
	case *ast.FieldList:
		for _, field := range node.List {
			u.node(field)
		}
	case *ast.Field:
		u.node(node.Type)

	// statements

	case *ast.BlockStmt:
		defer u.scoped()()
		for _, stmt := range node.List {
			u.node(stmt)
		}
	case *ast.DeclStmt:
		u.node(node.Decl)
	case *ast.IfStmt:
		if node.Init != nil {
			u.node(node.Init)
		}