@Override
        public Void visitField(FieldExpression expression) {
            // Always quote fields: "foo"
            builder.append('"');
            builder.append(sanitizeString(expression.getName(), false));
            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