Section nodes don't expose boundVariables, resolvedVariableModes, etc

It seems variable properties are undefined on SectionNodes, despite being documented and available in the typescript typings.

for (const node of figma.currentPage.selection) {
  if (node.type === "SECTION") {
    console.log(node.boundVariables, node.resolvedVariableModes, node.explicitVariableModes);
  }
}