Pre action that succeeds if leaf token length is in the range of lengths (lengthNumber1,lengthNumber2), inclusive.
<fromRuleEltNumber,toRuleEltNumber>lengthr(lengthNumber1,lengthNumber2);
fromRuleEltNumber - type: int
toRuleEltNumber - type: int
lengthNumber1 - type: int
lengthNumber2 - type: int