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//! [0]
QDBusInterface remoteApp( "com.example.Calculator", "/Calculator/Operations",
"org.mathematics.RPNCalculator" );
remoteApp.call( "PushOperand", 2 );
remoteApp.call( "PushOperand", 2 );
remoteApp.call( "ExecuteOperation", "+" );
QDBusReply<int> reply = remoteApp.call( "PopOperand" );
if ( reply.isValid() )
printf( "%d", reply.value() ); // prints 4
//! [0]
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