isBetweenValues method
Returns an expression evaluating to true if this expression is between
lower and higher (both inclusive).
If not is set, the expression will be negated.
Implementation
BetweenExpression isBetweenValues(DT lower, DT higher, {bool not = false}) {
return BetweenExpression._(
target: this,
lower: variable(lower),
higher: variable(higher),
not: not,
);
}