@Override
        public Void visitMultiSelectList(MultiSelectListExpression expression) {
            // e.g.: [foo, bar[].baz]
            builder.append('[');
            for (int i = 0; i < expression.getExpressions().size(); i++) {
                expression.getExpressions().get(i).accept(this);
                if (i < expression.getExpressions().size() - 1) {
                    builder.append(", ");
                }
            }
            builder.append(']');
            return null;
        }
Serialize the given JMESPath expression to a string.

@param expression JMESPath expression to serialize.
@return Returns the serialized expression.
smithy-jmespath/src/main/java/software/amazon/smithy/jmespath/ExpressionSerializer.java