Import error: cannot import name _SessionSignalEvents from flask_sqlalchemy

I came across the import error at this line:
https://github.com/aws/aws-xray-sdk-python/blob/master/aws_xray_sdk/ext/flask_sqlalchemy/query.py#L4

Package:
flask-sqlalchemy, 3.0.0
aws-xray-sdk-python, 2.10.0

It works fine when I downgrade flask-sqlalchemy to version 2.5.1

Start with aws_xray_sdk/ext/flask_sqlalchemy/query.py at the reported import on line 4 and reproduce the failure using Flask-SQLAlchemy 3.0.0 with aws-xray-sdk-python 2.10.0. Compare the behavior with Flask-SQLAlchemy 2.5.1; the issue is done when the supported newer package version no longer raises this import error.

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