public boolean hasValidSignature() {
        return signature.equals(SIGNATURE_WEB) || signature.equals(SIGNATURE_RAW)
                || signature.equals(SIGNATURE_FS);
    }
Structure for Unity asset bundles.

@author Nico Bergemann <barracuda415 at yahoo.de>
@unity UnityWebStreamHeader
disunity-core/src/main/java/info/ata4/junity/bundle/BundleHeader.java