text: import { declare } from "@babel/helper-plugin-utils";
  import rewritePattern from "regexpu-core";
  import * as regex from "@babel/helper-regex";
  
  export default declare((api, options) => {
    api.assertVersion(7);
  
    const { useUnicodeFlag = true } = options;
    if (typeof useUnicodeFlag !== "boolean") {
      throw new Error(".useUnicodeFlag must be a boolean, or undefined");
    }
  
    return {
      visitor: {
        RegExpLiteral(path) {
          const node = path.node;
          if (!regex.is(node, "u")) {
            return;
          }
          node.pattern = rewritePattern(node.pattern, node.flags, {
            unicodePropertyEscape: true,
            useUnicodeFlag,
          });
          if (!useUnicodeFlag) {
            regex.pullFlag(node, "u");
          }
        },
      },
    };
  });
  