code: public Collection<TextAnnotation> getTextAnnotationsByConfidenceValue(final Double confidenceValue) {
          return FluentIterable.from(getTextAnnotations())
                  .filter(new Predicate<TextAnnotation>() {
                      @Override
                      public boolean apply(TextAnnotation e) {
                          return e.confidence.doubleValue() >= confidenceValue
                                  .doubleValue();
                      }
                  }).toList();
      }
docs: Returns a {@link Collection} of {@link TextAnnotation}s which confidences values are greater than or equal
  to the value passed by parameter
  
  @param confidenceValue Threshold confidence value
  @return