cli[patch]: Update migrations file manually (#21021)

We need to replace occurrences in the code of RunnableMap not just the
import,
so for now, we don't replace RunnableMap.

libs/cli/langchain_cli/namespaces/migrate/codemods/migrations/langchain_to_core.json

@@ -1569,7 +1569,7 @@
   ],
   [
     "langchain.schema.runnable.RunnableMap",
-    "langchain_core.runnables.RunnableParallel"
+    "langchain_core.runnables.RunnableMap"
   ],
   [
     "langchain.schema.runnable.RunnableParallel",
@@ -1629,7 +1629,7 @@
   ],
   [
     "langchain.schema.runnable.base.RunnableMap",
-    "langchain_core.runnables.RunnableParallel"
+    "langchain_core.runnables.RunnableMap"
   ],
   [
     "langchain.schema.runnable.base.coerce_to_runnable",

libs/cli/tests/unit_tests/migrate/cli_runner/cases/imports_with_alias_changes.py

@@ -0,0 +1,29 @@
+"""Handle a test case where the import is updated and may involve an alias change."""
+from tests.unit_tests.migrate.cli_runner.case import Case
+from tests.unit_tests.migrate.cli_runner.file import File
+
+# The test case right now make sure that if we update the import
+# of RunnableMap to RunnableParallel then the code that's using RunnableMap
+# should be updated as well (or else we keep importing RunnableMap.)
+cases = [
+    Case(
+        name="Imports",
+        source=File(
+            "app.py",
+            content=[
+                "from langchain.runnables import RunnableMap",
+                "",
+                "chain = RunnableMap({})",
+            ],
+        ),
+        expected=File(
+            "app.py",
+            content=[
+                "from langchain_core.runnables import RunnableMap",
+                "",
+                "chain = RunnableMap({})",
+            ],
+        ),
+    ),
+]
+""