public JmespathExpression getComparison() {
        return comparison;
    }
A projection that filters values using a comparison.

<p>A filter projection executes the left AST expression, expects it to
return an array of values, passes each result of the left expression to
a {@link ComparatorExpression}, and yields any value from the comparison
expression that returns {@code true} to the right AST expression.

<p>Note: while this expression does have a comparator expression, it is
still considered a binary expression because it has a left hand side and
a right hand side.

@see <a href="https://jmespath.org/specification.html#filter-expressions">Filter Expressions</a>
smithy-jmespath/src/main/java/software/amazon/smithy/jmespath/ast/FilterProjectionExpression.java