parameters: (self, k)
docstring: Get tree node at current input pointer + i ahead where i=1 is next node.
          i<0 indicates nodes in the past.  So LT(-1) is previous node, but
          implementations are not required to provide results for k < -1.
          LT(0) is undefined.  For i>=n, return null.
          Return null for LT(0) and any index that results in an absolute address
          that is negative.
  
          This is analogus to the LT() method of the TokenStream, but this
          returns a tree node instead of a token.  Makes code gen identical
          for both parser and tree grammars. :)
docstring_summary: Get tree node at current input pointer + i ahead where i=1 is next node.
          i<0 indicates nodes in the past.  So LT(-1) is previous node, but
          implementations are not required to provide results for k < -1.
          LT(0) is undefined.  For i>=n, return null.
          Return null for LT(0) and any index that results in an absolute address
          that is negative.
docstring_tokens: Get tree node at current input pointer + i ahead where i = 1 is next node . i<0 indicates nodes in the past . So LT ( - 1 ) is previous node but implementations are not required to provide results for k < - 1 . LT ( 0 ) is undefined . For i > = n return null . Return null for LT ( 0 ) and any index that results in an absolute address that is negative .
function: def LT(self, k):
          """
          Get tree node at current input pointer + i ahead where i=1 is next node.
          i<0 indicates nodes in the past.  So LT(-1) is previous node, but
          implementations are not required to provide results for k < -1.
          LT(0) is undefined.  For i>=n, return null.
          Return null for LT(0) and any index that results in an absolute address
          that is negative.
  
          This is analogus to the LT() method of the TokenStream, but this
          returns a tree node instead of a token.  Makes code gen identical
          for both parser and tree grammars. :)
          """
  
          raise NotImplementedError
function_tokens: def LT ( self , k ) : raise NotImplementedError