Is there anyway to retrieve a private key that was added to the keystore?

I am referring to this screen where the user can add a new key to the realm’s keystore. Can the private Key provided here be retrieved from within the codebase? Is there anything in the current codebase where I can refer to as an example?

In my use case, I have added a function to services/src/main/java/org/keycloak/broker/oidc/ for JWE decryption. It’s not a good idea at the moment because the private key is hardcoded into the source code. I was wondering if there was anyway I could retrieve the the Private RSA Key from the realm instead?

protected String getDecryptedToken(String encryptedToken)  {
    	String decryptedToken = encryptedToken;
    	try {
    		//setup the private key to use
    		String privateKeyString = "...";
    		//create a private key object from the Base64 representation
			KeyFactory kf = KeyFactory.getInstance("RSA");
			PKCS8EncodedKeySpec keySpecPKCS8 = new PKCS8EncodedKeySpec(Base64.getDecoder().decode(privateKeyString));
			PrivateKey privKey = kf.generatePrivate(keySpecPKCS8);
			//create a JWE from the string of the JWE
			JWEObject jweObject = JWEObject.parse(encryptedToken);
			//perform decryption
			RSADecrypter decrypter = new RSADecrypter(privKey);
			decryptedToken = jweObject.getPayload().toString();
			logger.debug("JWE Token decrypted: " + decryptedToken);
		} catch (NoSuchAlgorithmException e) {
			throw new IdentityBrokerException("No such algorithm", e);
		} catch (NullPointerException e) {
			throw new IdentityBrokerException("Error decoding key", e);
		} catch (InvalidKeySpecException e) {
			throw new IdentityBrokerException("Invalid key used", e);
		} catch (ParseException e) {
			throw new IdentityBrokerException("Error parsing JWE", e);
		} catch (JOSEException e) {
			throw new IdentityBrokerException("Invalid JOSE format", e);
		} catch (Exception e) {
			throw new IdentityBrokerException("A decryption error has occured", e);
    	return decryptedToken;

I found a class whose methods I could use: org.keycloak.keys.ImportedRsaKeyProvider

Is there any api to get private keys from keycloack?