symbol "&"

[tbutton]

how nim can generate "&" symbol, like there void keyDown(StringHash eventType, 
VariantMap& eventData); i tried this code: proc 
keyDown(eventType:stringHash,eventData:ptr variantMap){.codegenDecl:"$# 
MyApp::$#$#",exportc.} or this proc keyDown(eventType:stringHash,eventData:ref 
variantMap){.codegenDecl:"$# MyApp::$#$#",exportc.} but it generates "*", not 
"&" what code should i write to nim to generates "&"?