Here is an example of using the SimpleDeserializers class from the Jackson databind package in Java:

import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.deser.SimpleDeserializers;

public class MySimpleDeserializers extends SimpleDeserializers {
    private static final long serialVersionUID = 1L;

    public MySimpleDeserializers() {
        // Add custom deserializers here
        addDeserializer(MyObject.class, new MyObjectDeserializer());
    }

    private static class MyObjectDeserializer extends JsonDeserializer<MyObject> {
        @Override
        public MyObject deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
            // Implement deserialization logic here
            // ...
        }
    }
}

You can use this custom deserializers class by registering it with the ObjectMapper:

ObjectMapper mapper = new ObjectMapper();
mapper.setDeserializers(new MySimpleDeserializers());

This creates a custom deserializer for the MyObject class, which can be used to define custom deserialization logic for that class when it is deserialized from JSON.