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* Remove check narrowing only certain types, add test showing issues with this * string literal case test * Reconcile fix with CFA work * Defaultable -> NotNarrowable to align with use * Missed a defaultable in comments * Add test for narrowing to unions of string literals * Actually merge from master * Run fixupParentReferences when parsing isolated jsDocComment * initial revision of unit test support for project system in tsserver * Add non-widening forms of null and undefined * Create separate control flows for property declarations with initializers * Add regression test * Add tests * Remove unused variable * Add null check and CR feedback * Revert "Merge pull request #7235 from weswigham/narrow-all-types" This reverts commit ef0f6c8fe4f94a7e294cfe42d7025c9dca6535d5, reversing changes made to 9f087cb62ade7a879e23c229df752fc8f87d679c. * reuse the fixupParentReferences function * Fix up error from merging with master