/**
* Method to create {@link PKIMessage} from {@link CertRequest},{@link ProofOfPossession}, {@link
* CertReqMsg}, {@link CertReqMessages}, {@link PKIHeader} and {@link PKIBody}.
/**
* Method to create {@link PKIMessage} from {@link CertRequest},{@link ProofOfPossession}, {@link
* CertReqMsg}, {@link CertReqMessages}, {@link PKIHeader} and {@link PKIBody}.