prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Awkward v2 mixins not propagated upwards
  ### Version of Awkward Array
  
  2.0.0rc1
  
  ### Description and code to reproduce
  
  Coffea tests with awkwardv2 fail with: `E   AttributeError: module 'awkward.behaviors' has no attribute 'mixin_class'`
  
  `awkward.mixin_class` has moved to `awkward.behaviors.mixins.mixin_class`, along with all other mixin decorators.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `src/awkward/__init__.py`
  Content:
  ```
  1 # BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE
  2 
  3 # NumPy-like alternatives
  4 import awkward.nplikes
  5 
  6 # shims for C++ (now everything is compiled into one 'awkward._ext' module)
  7 import awkward._ext
  8 
  9 # Compiled dynamic modules
  10 import awkward._cpu_kernels
  11 import awkward._libawkward
  12 
  13 # layout classes; functionality that used to be in C++ (in Awkward 1.x)
  14 import awkward.index
  15 import awkward.identifier
  16 import awkward.contents
  17 import awkward.record
  18 import awkward.types
  19 import awkward.forms
  20 import awkward._slicing
  21 import awkward._broadcasting
  22 import awkward._typetracer
  23 
  24 # internal
  25 import awkward._util
  26 import awkward._errors
  27 import awkward._lookup
  28 
  29 # third-party connectors
  30 import awkward._connect.numpy
  31 import awkward._connect.numexpr
  32 import awkward.numba
  33 import awkward.jax
  34 
  35 # high-level interface
  36 from awkward.highlevel import Array
  37 from awkward.highlevel import Record
  38 from awkward.highlevel import ArrayBuilder
  39 
  40 # behaviors
  41 import awkward.behaviors.categorical
  42 import awkward.behaviors.mixins
  43 import awkward.behaviors.string
  44 
  45 behavior = {}
  46 awkward.behaviors.string.register(behavior)  # noqa: F405
  47 awkward.behaviors.categorical.register(behavior)  # noqa: F405
  48 
  49 # operations
  50 from awkward.operations import *
  51 
  52 # temporary shim to access v2 under _v2
  53 import awkward._v2
  54 
  55 # version
  56 __version__ = awkward._ext.__version__
  57 __all__ = [x for x in globals() if not x.startswith("_")]
  58 
  59 
  60 def __dir__():
  61     return __all__
  62
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/src/awkward/__init__.py b/src/awkward/__init__.py
  --- a/src/awkward/__init__.py
  +++ b/src/awkward/__init__.py
  @@ -39,8 +39,8 @@
   
   # behaviors
   import awkward.behaviors.categorical
  -import awkward.behaviors.mixins
   import awkward.behaviors.string
  +from awkward.behaviors.mixins import mixin_class, mixin_class_method
   
   behavior = {}
   awkward.behaviors.string.register(behavior)  # noqa: F405
  
verification_info: {"golden_diff": "diff --git a/src/awkward/__init__.py b/src/awkward/__init__.py\n--- a/src/awkward/__init__.py\n+++ b/src/awkward/__init__.py\n@@ -39,8 +39,8 @@\n \n # behaviors\n import awkward.behaviors.categorical\n-import awkward.behaviors.mixins\n import awkward.behaviors.string\n+from awkward.behaviors.mixins import mixin_class, mixin_class_method\n \n behavior = {}\n awkward.behaviors.string.register(behavior)  # noqa: F405\n", "issue": "Awkward v2 mixins not propagated upwards\n### Version of Awkward Array\r\n\r\n2.0.0rc1\r\n\r\n### Description and code to reproduce\r\n\r\nCoffea tests with awkwardv2 fail with: `E   AttributeError: module 'awkward.behaviors' has no attribute 'mixin_class'`\r\n\r\n`awkward.mixin_class` has moved to `awkward.behaviors.mixins.mixin_class`, along with all other mixin decorators.\n", "before_files": [{"content": "# BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE\n\n# NumPy-like alternatives\nimport awkward.nplikes\n\n# shims for C++ (now everything is compiled into one 'awkward._ext' module)\nimport awkward._ext\n\n# Compiled dynamic modules\nimport awkward._cpu_kernels\nimport awkward._libawkward\n\n# layout classes; functionality that used to be in C++ (in Awkward 1.x)\nimport awkward.index\nimport awkward.identifier\nimport awkward.contents\nimport awkward.record\nimport awkward.types\nimport awkward.forms\nimport awkward._slicing\nimport awkward._broadcasting\nimport awkward._typetracer\n\n# internal\nimport awkward._util\nimport awkward._errors\nimport awkward._lookup\n\n# third-party connectors\nimport awkward._connect.numpy\nimport awkward._connect.numexpr\nimport awkward.numba\nimport awkward.jax\n\n# high-level interface\nfrom awkward.highlevel import Array\nfrom awkward.highlevel import Record\nfrom awkward.highlevel import ArrayBuilder\n\n# behaviors\nimport awkward.behaviors.categorical\nimport awkward.behaviors.mixins\nimport awkward.behaviors.string\n\nbehavior = {}\nawkward.behaviors.string.register(behavior)  # noqa: F405\nawkward.behaviors.categorical.register(behavior)  # noqa: F405\n\n# operations\nfrom awkward.operations import *\n\n# temporary shim to access v2 under _v2\nimport awkward._v2\n\n# version\n__version__ = awkward._ext.__version__\n__all__ = [x for x in globals() if not x.startswith(\"_\")]\n\n\ndef __dir__():\n    return __all__\n", "path": "src/awkward/__init__.py"}], "after_files": [{"content": "# BSD 3-Clause License; see https://github.com/scikit-hep/awkward-1.0/blob/main/LICENSE\n\n# NumPy-like alternatives\nimport awkward.nplikes\n\n# shims for C++ (now everything is compiled into one 'awkward._ext' module)\nimport awkward._ext\n\n# Compiled dynamic modules\nimport awkward._cpu_kernels\nimport awkward._libawkward\n\n# layout classes; functionality that used to be in C++ (in Awkward 1.x)\nimport awkward.index\nimport awkward.identifier\nimport awkward.contents\nimport awkward.record\nimport awkward.types\nimport awkward.forms\nimport awkward._slicing\nimport awkward._broadcasting\nimport awkward._typetracer\n\n# internal\nimport awkward._util\nimport awkward._errors\nimport awkward._lookup\n\n# third-party connectors\nimport awkward._connect.numpy\nimport awkward._connect.numexpr\nimport awkward.numba\nimport awkward.jax\n\n# high-level interface\nfrom awkward.highlevel import Array\nfrom awkward.highlevel import Record\nfrom awkward.highlevel import ArrayBuilder\n\n# behaviors\nimport awkward.behaviors.categorical\nimport awkward.behaviors.string\nfrom awkward.behaviors.mixins import mixin_class, mixin_class_method\n\nbehavior = {}\nawkward.behaviors.string.register(behavior)  # noqa: F405\nawkward.behaviors.categorical.register(behavior)  # noqa: F405\n\n# operations\nfrom awkward.operations import *\n\n# temporary shim to access v2 under _v2\nimport awkward._v2\n\n# version\n__version__ = awkward._ext.__version__\n__all__ = [x for x in globals() if not x.startswith(\"_\")]\n\n\ndef __dir__():\n    return __all__\n", "path": "src/awkward/__init__.py"}]}