public boolean usesDefaultTag() {
    return isDefaultTag(tag);
  }
Returns {@code true} if the {@link ImageReference} uses the default tag ({@code latest});
{@code false} if not.

@return {@code true} if uses the default tag; {@code false} if not
jib-core/src/main/java/com/google/cloud/tools/jib/api/ImageReference.java