Model Bind runs into NPE when no

**Describe the Bug**
The model bind runs into an NPE when no accessor is present on the model

**To Reproduce**
Steps to reproduce the behavior:
Register a model bind on a model that has no accessible

**Expected behavior**
Model binding should work without using an accessible

**Environment Information:**
- Java Language Level 8
- Version 1.0.1

Start by locating the model-binding implementation and reproduce the issue with a model that has no accessible accessor, as described in the report. Done means model binding completes without an NPE when no accessor is present; the payload names no files or tests to run.

Written by the indexing model from the issue text.