@Override
    public <T> T accept(ExpressionVisitor<T> visitor) {
        return visitor.visitFunction(this);
    }
Executes a function by name using a list of argument expressions.

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