public virtual IList<int> GetLookaheadDFAColumnsForLineInFile( int line )
{
string prefix = line + ":";
var columns = new List<int>();
foreach ( string key in lineColumnToLookaheadDFAMap.Keys )
{
if ( key.StartsWith( prefix ) )
{
columns.Add( int.Parse( key.Substring( prefix.Length ) ) );
}
}
return columns;
}