public boolean equals(Object obj) {
        if (obj == this) {
            return true;   
        }
        if (!(obj instanceof AbstractBlock)) {
            return false;   
        }
        AbstractBlock that = (AbstractBlock) obj;
        if (!ObjectUtilities.equal(this.id, that.id)) {
            return false;
        }
        if (!this.frame.equals(that.frame)) {
            return false;   
        }
        if (!this.bounds.equals(that.bounds)) {
            return false;   
        }
        if (!this.margin.equals(that.margin)) {
            return false;   
        }
        if (!this.padding.equals(that.padding)) {
            return false;   
        }
        if (this.height != that.height) {
            return false;   
        }
        if (this.width != that.width) {
            return false;   
        }
        return true;