Represents the between operator. The left operand to between must be a single value and
the right operand must be a list - this operator returns true if the left operand is
between (using the registered comparator) the two elements in the list. The definition
of between being inclusive follows the SQL BETWEEN definition.
Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
Returns a boolean based on whether a value is in the range expressed. The first
operand is any value whilst the second is a list of two values - those two values
being the bounds allowed for the first operand (inclusive).