COSEKey constructor
      
      COSEKey({})
     
    
    
Implementation
COSEKey(
    {this.keyType,
    this.keyOps,
    List<int>? keyId,
    this.algorithmId,
    List<int>? baseInitVector,
    Map<COSELabel, CborObject>? otherHeaders})
    : keyId = keyId?.immutable,
      baseInitVector = baseInitVector?.immutable,
      otherHeaders = otherHeaders?.immutable;