AppendOperator
AppendOperator(kBeginSession);
AppendOperator(kEndSession);
AppendOperator(kOpenDataSource);
AppendOperator(kCloseDataSource);
AppendOperator(kBeginPage);
AppendOperator(kBeginPage);
AppendOperator(kEndPage);
AppendOperator(kSetPageOrigin);
AppendOperator(kSetColorSpace);
AppendOperator(kSetPaintTxMode);
AppendOperator(kSetSourceTxMode);
AppendOperator(kSetROP);
AppendOperator(kSetCursor);
AppendOperator(kBeginImage);
AppendOperator(kReadImage);
AppendOperator(kEndImage);
void AppendOperator(Operator op);