error-prone-support-example-2.java

  static final class StringIsEmpty {
    @BeforeTemplate
    boolean equalsEmptyString(String string) {
      return string.equals("");
    }
    
    @BeforeTemplate
    boolean lengthEquals0(String string) {
      return string.length() == 0;
    }

    @AfterTemplate
    boolean after(String string) {
      return string.isEmpty();
    }
  }

Line 14 should likely be return string.isEmpty();.

@ePaul thanks for pointing out, that was indeed a typo.