public FluentEmitter Else()
{
if(IfBlocks.Count == 0 || IfBlocks.Peek().OpCode == OpCodes.Br)
throw new Exception("no if blfor else");
Nop();
var jumpstart = LastEmittedInstruction;
EndIf();
var block = new IfBlock() { StartInstruction = jumpstart, OpCode = OpCodes.Br }; // it jumps if value top on stack is true
IfBlocks.Push(block);
return this;
}