Intent of prefixSumComputer.test|title=Editor ViewModel - PrefixSumComputer setValue between queries re-validates correctly|occurrence=1

All 2 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 2 tests
- editor/ 2 tests
  - test/ 2 tests
    
    common/ 2 tests
    
    viewModel/ 2 tests
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/viewModel/prefixSumComputer.test|title=Editor ViewModel - PrefixSumComputer comprehensive setValue and getIndexOf|occurrence=1 Inherited prefixSumComputer.test|title=Editor ViewModel - PrefixSumComputer comprehensive setValue and getIndexOf|occurrence=1
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/editor/test/common/viewModel/prefixSumComputer.test|title=Editor ViewModel - PrefixSumComputer setValue between queries re-validates correctly|occurrence=1 Introduced here