If we are debugging or building a parse tree for a visitor,
we need to track all of the tokens and rule invocations associated
with this rule's context. This is empty for parsing w/o tree constr.
operation because we don't the need to track the details about
how we parse this rule.
If we are debugging or building a parse tree for a visitor, we need to track all of the tokens and rule invocations associated with this rule's context. This is empty for parsing w/o tree constr. operation because we don't the need to track the details about how we parse this rule.