package estivate.core.ast;

import lombok.Data;

@Data
public abstract class ExpressionAST {

	protected QueryAST query;

	protected ReduceAST reduce;

	protected Boolean optional;

}

@@ -90,24 +90,63 @@
 ionAST %7B%0D%0A%0D%0A
+    protected Boolean optional;%0D%0A    %0D%0A
 %09protected Q
@@ -206,32 +206,38 @@
 otected 
-Boolean optional
+ConverterAST converter
 ;%0D%0A%0D%0A%7D%0D%0A

add converter on expressionAST