This is very confusing as seen in #12974 or #12906. My suggestion would be "legacy."
}
  )
);
gulp.task(
  "lib-es5",
  gulp.series(
    "buildnumber",
    "default_preferences",
    function scripting() {
      var defines = builder.merge(DEFINES, {
        GENERIC: true,
        LIB: true,
        SKIP_BABEL: false,
      });
      return createTemporaryScriptingBundle(defines);
    },
    function () {
      var defines = builder.merge(DEFINES, {
        GENERIC: true,
        LIB: true,
        SKIP_BABEL: false,
      });
      return merge([
        buildLib(defines, "build/lib-es5/"),
        createSandboxBundle(defines).pipe(gulp.dest("build/lib-es5/")),
      ]);
    }
  )
);
function compressPublish(targetName, dir) {