AptosMultiEd25519Signature constructor
      
      AptosMultiEd25519Signature({ 
    
    
- required List<AptosEd25519Signature> signatures,
- required List<int> bitmap,
Implementation
factory AptosMultiEd25519Signature(
    {required List<AptosEd25519Signature> signatures,
    required List<int> bitmap}) {
  if (signatures.length > AptosConstants.maxSignatureLength) {
    throw DartAptosPluginException(
        "Signature length exceeds the maximum allowed limit of ${AptosConstants.maxSignatureLength}.");
  }
  if (bitmap.length != AptosConstants.bitmapLength) {
    throw DartAptosPluginException(
        "Bitmap length must be exactly ${AptosConstants.bitmapLength}",
        details: {"length": bitmap.length});
  }
  return AptosMultiEd25519Signature._(signatures: signatures, bitmap: bitmap);
}