#vulnerable code 
                              @Test
  public void describeAsAdditionalInfo_empty() {
    Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
    assertThat(exceptions.describeAsAdditionalInfo().asIterable()).isEmpty();
  } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                              @Test
  public void describeAsAdditionalInfo_empty() {
    Correspondence.ExceptionStore exceptions = Correspondence.ExceptionStore.forIterable();
    assertThat(exceptions.describeAsAdditionalInfo()).isEmpty();
  }