/*
Gets end mark of an AST

@param {Node} ast

@returns {Mark}
function getNodeEndMark(ast) {
  if (isArray(ast.value) && ast.value.length) {
    let lastItem = last(ast.value);

    if (isArray(lastItem) && lastItem.length) {
      return getNodeEndMark(last(lastItem));
    }

    return getNodeEndMark(lastItem);
  }

  return ast.end_mark;
}