func (l *ListNode) Copy() Node {
	return l.CopyList()
}

// TextNode holds plain text.
type TextNode struct {
	NodeType
	Pos
	tr   *Tree
	Text []byte // The text; may span newlines.
}

func (t *Tree) newText(pos Pos, text string) *TextNode {
	return &TextNode{tr: t, NodeType: NodeText, Pos: pos, Text: []byte(text)}
}

func (t *TextNode) String() string {
	return fmt.Sprintf(textFormat, t.Text)
}

	// executes a given template in different escaping contexts.
	actionNodeEdits   map[*parse.ActionNode][]string
	templateNodeEdits map[*parse.TemplateNode]string
	textNodeEdits     map[*parse.TextNode][]byte
	// rangeContext holds context about the current range loop.
	rangeContext *rangeContext
}

// rangeContext holds information about the current range loop.
type rangeContext struct {

	case *IfNode:
	case *ListNode:
		for _, node := range n.Nodes {
			if !IsEmptyTree(node) {
				return false
			}
		}
		return true
	case *RangeNode:
	case *TemplateNode:
	case *TextNode:
		return len(bytes.TrimSpace(n.Text)) == 0
	case *WithNode:
	default:
		panic("unknown node: " + n.String())
	}
	return false
}

// parse is the top-level parser for a template, essentially the same

	case *parse.ListNode:
		for _, node := range node.Nodes {
			s.walk(dot, node)
		}
	case *parse.RangeNode:
		s.walkRange(dot, node)
	case *parse.TemplateNode:
		s.walkTemplate(dot, node)
	case *parse.TextNode:
		if _, err := s.wr.Write(node.Text); err != nil {
			s.writeError(err)
		}
	case *parse.WithNode:
		s.walkIfOrWith(parse.NodeWith, dot, node.Pipe, node.List, node.ElseList)
	default:

			"<script>`${ `}",
			context{state: stateJSTmplLit, element: elementScript},
		},
	}

	for _, test := range tests {
		b, e := []byte(test.input), makeEscaper(nil)
		c := e.escapeText(context{}, &parse.TextNode{NodeType: parse.NodeText, Text: b})
		if !test.output.eq(c) {
			t.Errorf("input %q: want context\n\t%v\ngot\n\t%v", test.input, test.output, c)
			continue
		}
		if test.input != string(b) {

depth++;}else{if(textNode!==undefined){emitSaxKey(textNode);textNode=undefined;}}
state=VALUE;}else if(c==='}'){if(textNode!==undefined){emitValueOpen(textNode);emitValueClose();textNode=undefined;}

		{"TemplateNode.Name", Field, 0},
		{"TemplateNode.NodeType", Field, 0},
		{"TemplateNode.Pipe", Field, 0},
		{"TemplateNode.Pos", Field, 1},
		{"TextNode", Type, 0},
		{"TextNode.NodeType", Field, 0},
		{"TextNode.Pos", Field, 1},
		{"TextNode.Text", Field, 0},
		{"Tree", Type, 0},
		{"Tree.Mode", Field, 16},
		{"Tree.Name", Field, 0},
		{"Tree.ParseName", Field, 1},
		{"Tree.Root", Field, 0},

    def "collects endorsed strict versions from multiple sources"() {
        when:
        edge(root, false) // not-endorsing edge
        def endorseFrom1 = edge(root, false, null, nextNode(1), true)
        def endorseFrom2 = edge(root, false, null, nextNode(4), true)
        root.collectEndorsedStrictVersions([endorseFrom1, endorseFrom2])
        def endorsedStrictVersions = root.getEndorsedStrictVersions(edge(root, false))

        then:

package main

type Node struct {
	Circular bool
}

type ExtNode[V any] struct {
	v V
	Node
}

type List[V any] struct {
	root *ExtNode[V]
	len  int
}

func (list *List[V]) PushBack(arg V) {
	if list.len == 0 {
		list.root = &ExtNode[V]{v: arg}
		list.root.Circular = true
		list.len++
		return
	}
	list.len++
}

func main() {
	var v List[int]
	v.PushBack(1)

        "orientation": "horizontal",
        "reduceOptions": {
          "calcs": [
            "mean"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.1.5",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },