AST node that represents a range of values (such as min expression:max expression), therefore having two child nodes.
Other parser items:
BinaryOpNode
,
FormulaNode
,
FunctionNode
,
GroupNode
,
Node
,
NumericNode
,
ParameterNode
,
StringNode
,
SymbolNode
,
UnaryOpNode
DSLite::Node
-> RangeNode