const char * const PLAY_STATE_NAME( "playState" );
const char * const CURRENT_FRAME_NUMBER_NAME( "currentFrameNumber" );
const char * const TOTAL_FRAME_NUMBER_NAME( "totalFrameNumber" );
const char * const PLAY_STATE_NAME( "playState" );
const char * const CURRENT_FRAME_NUMBER_NAME( "currentFrameNumber" );
const char * const TOTAL_FRAME_NUMBER_NAME( "totalFrameNumber" );