private void UpdateLineColumnToLookaheadDFAMap( DFA lookaheadDFA )
{
GrammarAST decisionAST = nfa.Grammar.GetDecisionBlockAST( lookaheadDFA.DecisionNumber );
int line = decisionAST.Line;
int col = decisionAST.CharPositionInLine;
lineColumnToLookaheadDFAMap[line + ":" + col] = lookaheadDFA;
}