BlockSvg.getSvgRoot() 方法
傳回 SVG 的根節點；如果不存在，則傳回空值。
Signature:
getSvgRoot(): SVGGElement;
傳回：
SVGGElement
根 SVG 節點 (可能是群組)。
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上次更新時間：2025-07-25 (世界標準時間)。
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-07-25 (世界標準時間)。"],[],["The `getSvgRoot()` method, part of the `BlockSvg` class, retrieves the root node of the SVG element. It returns an `SVGGElement`, which is the root SVG node, likely a group. If no root node exists, it returns null. This method's core function is to provide access to the SVG's top-level element within the Blockly block structure.\n"]]