function processTopLevelNode(node, expectedIndent) {
    const token = tokenStore.getFirstToken(node)
    const offsetInfo = offsets.get(token)
    if (offsetInfo == null) {
      offsets.set(token, {
        baseToken: null,
        offset: 0,
        baseline: false,
        expectedIndent
      })
    } else {
      offsetInfo.expectedIndent = expectedIndent
    }
  }
Set the base indentation to a given top-level AST node.
@param {ASTNode} node The node to set.
@param {number} expectedIndent The number of expected indent.
@returns {void}