fix MPS-18652: mistake in finder: classifierType's ref can be broken
fix MPS-18740: MethodDeclarations fixer tries to fix method which was removed in the same command
fix MPS-18983 error on startup (get rid of FakeSModelDescriptor creation)
fix  MPS-18983: FakeSModelDescriptor: remove unchecked getModelDescriptor() in assertions
fix  MPS-18983: FakeSModelDescriptor: got rid of getDescriptorChecked()
fix  MPS-18983: FakeSModelDescriptor: got rid of descriptor in refactorings
fix  MPS-18983: FakeSModelDescriptor: got rid of descriptor in refactorings
fix  MPS-18983: FakeSModelDescriptor: got rid of descriptor in refactorings
fix  MPS-18983: FakeSModelDescriptor: got rid of descriptor in refactorings
fix  MPS-18983: FakeSModelDescriptor: got rid of descriptor in ASMModelLoader
fix  MPS-18983: FakeSModelDescriptor: SNode.needFireEvent()

fix  MPS-18983: FakeSModelDescriptor: SNode.needFireEvent()
fix  MPS-18983: FakeSModelDescriptor: ClassifierUpdater
fix  MPS-18983: FakeSModelDescriptor: SModel
fix  MPS-18983: FakeSModelDescriptor: FileSwapOwner
fix  MPS-18983: FakeSModelDescriptor: ReloadableSModelBase
fix  MPS-18983: FakeSModelDescriptor: FileSwapOwnerTest
fix  MPS-18983: FakeSModelDescriptor: ProjectStructureBuilder
fix  MPS-18983: FakeSModelDescriptor: SNode.getModel
fix  MPS-18983: FakeSModelDescriptor: MergeData

fix  MPS-18983: FakeSModelDescriptor: MergeData
MergeCoreTest can be run separately