code: function isEmptyString(node) {
      return astUtils.isStringLiteral(node) && (node.value === "" || (node.type === "TemplateLiteral" && node.quasis.length === 1 && node.quasis[0].value.cooked === ""));
  }
docs: Checks whether a node is an empty string literal or not.
  @param {ASTNode} node The node to check.
  @returns {boolean} Whether or not the passed in node is an
  empty string literal or not.