@Deprecated
    public static boolean isSetup() {
        return glide != null;
    }
Returns false if the {@link Glide} singleton has not yet been created and can therefore be setup using
{@link #setup(GlideBuilder)}.

@see #setup(GlideBuilder)

@deprecated Use {@link GlideModule} instead. Scheduled to be removed in Glide 4.0.
core/src/main/java/com/bumptech/glide/Glide.java