chore: import upstream snapshot with attribution

haystack/components/joiners/__init__.py

@@ -0,0 +1,26 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import sys
+from typing import TYPE_CHECKING
+
+from lazy_imports import LazyImporter
+
+_import_structure = {
+    "answer_joiner": ["AnswerJoiner"],
+    "branch": ["BranchJoiner"],
+    "document_joiner": ["DocumentJoiner"],
+    "list_joiner": ["ListJoiner"],
+    "string_joiner": ["StringJoiner"],
+}
+
+if TYPE_CHECKING:
+    from .answer_joiner import AnswerJoiner as AnswerJoiner
+    from .branch import BranchJoiner as BranchJoiner
+    from .document_joiner import DocumentJoiner as DocumentJoiner
+    from .list_joiner import ListJoiner as ListJoiner
+    from .string_joiner import StringJoiner as StringJoiner
+
+else:
+    sys.modules[__name__] = LazyImporter(name=__name__, module_file=__file__, import_structure=_import_structure)