createEventHandler method
Implementation
o.Expression createEventHandler(List<o.Statement> stmts,
{List<o.Statement> localDeclarations = const []}) {
var methodName = '_handleEvent_${_eventHandlerCount++}';
methods.add(_createEventHandlerMethod(
methodName,
stmts,
localDeclarations,
));
return o.ReadClassMemberExpr(methodName);
}