Queries on _user.eval(".....") method in Agentry-java classes.

Hello Experts,

I found one method in Agentry-Java class, can any body please explain me how it works, It will help me to resolve one critical issue.

Context  -At the time of RemoveWorkOrdersStepHandler execution. (Fetch Removal step execution).

1.      this._user.eval("<<size objects>>") -Does this Objects represent the collection(:>Main Object>WorkOrders) on which fetch removal step is executing?

Thanks,

Sudhir.