function getVExpressionContainer(node) {
  /** @type {ASTNode | null} */
  let n = node
  while (n && n.type !== 'VExpressionContainer') {
    n = n.parent
  }
  return n
}
Gets the VExpressionContainer of a given node.
@param {ASTNode} node - The node to get.
@return {VExpressionContainer|null}