@Override
        public RetryableTrait createTrait(ShapeId target, Node value) {
            Builder builder = builder().sourceLocation(value.getSourceLocation());
            value.expectObjectNode().getBooleanMember("throttling", builder::throttling);
            RetryableTrait result = builder.build();
            result.setNodeCache(value);
            return result;
        }
@return Returns true if the retry is a throttle.
smithy-model/src/main/java/software/amazon/smithy/model/traits/RetryableTrait.java