How to use the @nimiq/core.PublicKey function in @nimiq/core

verifyRawSignature(signature, publicKey, message) {
		if (!(signature instanceof Nimiq.Signature)) {
			signature = new Nimiq.Signature(signature);
		}

		if (!(publicKey instanceof Nimiq.PublicKey)) {
			publicKey = new Nimiq.PublicKey(publicKey);
		}

		if (typeof message == "string") {
			message = Nimiq.BufferUtils.fromUtf8(txDetails.data);
		} else if (!(message instanceof Uint8Array)) {
			message = Nimiq.BufferUtils.fromUtf8(JSON.stringify(message, null, "\t"));
		}

		return signature.verify(publicKey, message);
	}

verifyKeyguardSignature(signedMessage, rawMessage) {
		const signature = signedMessage.signature instanceof Nimiq.Signature ? signedMessage.signature : new Nimiq.Signature(signedMessage.signature);
		const publicKey = signedMessage.signerPublicKey instanceof Nimiq.PublicKey ? signedMessage.signerPublicKey : new Nimiq.PublicKey(signedMessage.signerPublicKey);

		const data = HubApi.MSG_PREFIX + rawMessage.length + rawMessage;
		const dataBytes = Nimiq.BufferUtils.fromUtf8(data);
		const hash = Nimiq.Hash.computeSha256(dataBytes);

		return signature.verify(publicKey, hash);
	}