How to use the node-opcua-crypto.removePadding function in node-opcua-crypto

// now check signature ....
        const chunk = binaryStream.buffer;

        const signatureIsOK = verifyChunkSignatureWithDerivedKeys(chunk, derivedKeys);
        if (!signatureIsOK) {
            this._report_error("_decrypt_MSG : Sign and Encrypt : Invalid packet signature");
            return false;
        }

        // remove signature
        binaryStream.buffer = reduceLength(binaryStream.buffer, derivedKeys.signatureLength);

        if (this.securityMode === MessageSecurityMode.SignAndEncrypt) {
            // remove padding
            binaryStream.buffer = removePadding(binaryStream.buffer);
        }

        return true;
    }

// now check signature ....
    const chunk = binaryStream._buffer;

    const signatureIsOK = crypto_utils.verifyChunkSignatureWithDerivedKeys(chunk, derivedKeys);
    if (!signatureIsOK) {
        this._report_error("SIGN and ENCRYPT : Invalid packet signature");
        return false;
    }

    // remove signature
    binaryStream._buffer = crypto_utils.reduceLength(binaryStream._buffer, derivedKeys.signatureLength);

    if (this.securityMode === MessageSecurityMode.SIGNANDENCRYPT) {
        // remove padding
        binaryStream._buffer = crypto_utils.removePadding(binaryStream._buffer);
    }

    return true;
};

if (!signatureIsOK) {
            /* istanbul ignore next */
            if (doDebug) {
                debugLog(hexDump(binaryStream.buffer));
            }
            this._report_error("Sign and Encrypt asymmetricVerify : Invalid packet signature");
            return false;
        }

        // remove signature
        binaryStream.buffer = reduceLength(binaryStream.buffer, signatureLength);

        // remove padding
        if (asymmetricAlgorithmSecurityHeader.receiverCertificateThumbprint) {
            binaryStream.buffer = removePadding(binaryStream.buffer);
        }

        return true; // success
    }