TupleSet by specifying a range for each position of the
tuple.TupleSet by specifying a collection of tuplesLexer, only fullstop tokens are replaced
by EOF tokens.TupleSetPositionedNode,
i.e.PositionedNode begins.PositionedNode, i.e.PositionedNode ends.ITokens belonging to this
PositionedNode.ExactBound is never a variable as its values are completely
determined by the TupleSet.