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type MarkdownNode = {\n\ttype: string;\n\tvalue?: string;\n\turl?: string;\n\tchildren?: MarkdownNode[];\n\tposition?: MarkdownPosition;\n\tdata?: { hProperties?: Record };\n};\n\nlet BLOCKED = new Set([\n\t\"code\",\n\t\"definition\",\n\t\"image\",\n\t\"imageReference\",\n\t\"inlineCode\",\n\t\"link\",\n\t\"linkReference\",\n]);\n\nfunction text(value: string): MarkdownNode {\n\treturn { type: \"text\", value };\n}\n\nfunction referenceNode(reference: Chat.Reference, index: number): MarkdownNode {\n\treturn {\n\t\ttype: \"link\",\n\t\turl: reference.href,\n\t\tchildren: [text(reference.label)],\n\t\tdata: {\n\t\t\thProperties: {\n\t\t\t\tclassName: [\"chat-reference\"],\n\t\t\t\t\"data-chat-reference\": reference.kind,\n\t\t\t\t\"data-chat-reference-index\": String(index),\n\t\t\t},\n\t\t},\n\t};\n}\n\nfunction replaceTextNode(\n\tnode: MarkdownNode,\n\tmodel: ReferenceRenderModel,\n\thandled: Set,\n): MarkdownNode[] {\n\tlet start = node.position?.start.offset;\n\tlet end = node.position?.end.offset;\n\tif (\n\t\tstart === undefined\n\t\t|| end === undefined\n\t\t|| node.value === undefined\n\t\t|| model.source.slice(start, end) !== node.value\n\t) return [node];\n\tlet references = model.references\n\t\t.map((reference, index) => ({ reference, index }))\n\t\t.filter(item => item.reference.start >= start && item.reference.end <= end);\n\tif (references.length === 0) return [node];\n\n\tlet result: MarkdownNode[] = [];\n\tlet cursor = start;\n\tfor (let item of references) {\n\t\tif (item.reference.start > cursor) {\n\t\t\tresult.push(text(model.source.slice(cursor, item.reference.start)));\n\t\t}\n\t\tresult.push(referenceNode(item.reference, item.index));\n\t\thandled.add(item.index);\n\t\tcursor = item.reference.end;\n\t}\n\tif (cursor < end) result.push(text(model.source.slice(cursor, end)));\n\treturn result;\n}\n\nfunction offset(node: MarkdownNode, edge: \"start\" | \"end\"): number | undefined {\n\treturn 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