BatchEstimator may not be modified in command-mode, and there is a command-mode validation test.
Save Mode Tests
Ran the following scripts in save mode and added the save mode category tag to each
Field tests exist for each BatchEstimator field and there are also validation tests for each field.
BatchEstimator has no GUI. The only resource referenced by the BatchEstimator which appears in the GUI is Propagator. I verified that I was unable to delete a propagator that was referenced by the BatchEstimator.
However, attempting to rename the Propagator in the GUI crashes GMAT. See GMT-5833.