#include <nmapimailbox.h>

#include <nmapimessageenvelope.h>

NmApiEnvelopeListingPrivate::NmApiEnvelopeListingPrivate(QObject *parent) :

NmApiEnvelopeListingPrivate::~NmApiEnvelopeListingPrivate()

   \brief It initialize engine for email operations. 

   When use initializeEngine need to remember release it.

   It return value if initialization go good.

   \sa releaseEngine 

bool NmApiEnvelopeListingPrivate::initializeEngine()

    mEngine = NmApiEngine::instance();

   \brief It release engine for email operations.

   \sa initializeEngine

void NmApiEnvelopeListingPrivate::releaseEngine()

    NmApiEngine::releaseInstance(mEngine);

   \brief It grab envelopes from engine. 

   When it start grabing, it release all old.

   Because it uses NmApiMessageEnvelope with sharedData we don't need care about release memory.

   \return Count of envelopes or "-1" if there is no engine initialised

qint32 NmApiEnvelopeListingPrivate::grabEnvelopes()

    if(!mEngine){

        return -1;

    }