Method replace

java/com/google/re2j/RE2.java:399–402

(String orig)

        src,
        new ReplaceFunc() {
          @Override
          public String replace(String orig) {
            return repl;
          }
        },
        2 * src.length() + 1);
    // TODO(afrozm): Is the reasoning correct, there can be at the most 2*len +1