prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Move `ComposerTrainer` to top-level imports
  Our most heavily used objects should be easily importable from `composer` via:
  ```
  from composer import Trainer, ComposerModel
  ```
  rather than remember their submodule:
  
  ```
  from composer.models import ComposerModel
  ```
  
  Especially the last one, its tricky to remember whether its `models` or `model`
  
  </issue>
  <code>
  [start of composer/__init__.py]
  1 # Copyright 2021 MosaicML. All Rights Reserved.
  2 
  3 from composer import algorithms as algorithms
  4 from composer import callbacks as callbacks
  5 from composer import datasets as datasets
  6 from composer import loggers as loggers
  7 from composer import models as models
  8 from composer import optim as optim
  9 from composer import profiler as profiler
  10 from composer import trainer as trainer
  11 from composer import utils as utils
  12 from composer.core import Algorithm as Algorithm
  13 from composer.core import Callback as Callback
  14 from composer.core import DataSpec as DataSpec
  15 from composer.core import Engine as Engine
  16 from composer.core import Event as Event
  17 from composer.core import Logger as Logger
  18 from composer.core import State as State
  19 from composer.core import Time as Time
  20 from composer.core import Timer as Timer
  21 from composer.core import TimeUnit as TimeUnit
  22 from composer.core import types as types
  23 from composer.trainer import Trainer as Trainer
  24 
  25 __version__ = "0.3.1"
  26
  [end of composer/__init__.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/composer/__init__.py b/composer/__init__.py
  --- a/composer/__init__.py
  +++ b/composer/__init__.py
  @@ -20,6 +20,7 @@
   from composer.core import Timer as Timer
   from composer.core import TimeUnit as TimeUnit
   from composer.core import types as types
  +from composer.models import ComposerModel as ComposerModel
   from composer.trainer import Trainer as Trainer
   
   __version__ = "0.3.1"
  
verification_info: {"golden_diff": "diff --git a/composer/__init__.py b/composer/__init__.py\n--- a/composer/__init__.py\n+++ b/composer/__init__.py\n@@ -20,6 +20,7 @@\n from composer.core import Timer as Timer\n from composer.core import TimeUnit as TimeUnit\n from composer.core import types as types\n+from composer.models import ComposerModel as ComposerModel\n from composer.trainer import Trainer as Trainer\n \n __version__ = \"0.3.1\"\n", "issue": "Move `ComposerTrainer` to top-level imports\nOur most heavily used objects should be easily importable from `composer` via:\r\n```\r\nfrom composer import Trainer, ComposerModel\r\n```\r\nrather than remember their submodule:\r\n\r\n```\r\nfrom composer.models import ComposerModel\r\n```\r\n\r\nEspecially the last one, its tricky to remember whether its `models` or `model`\n", "before_files": [{"content": "# Copyright 2021 MosaicML. All Rights Reserved.\n\nfrom composer import algorithms as algorithms\nfrom composer import callbacks as callbacks\nfrom composer import datasets as datasets\nfrom composer import loggers as loggers\nfrom composer import models as models\nfrom composer import optim as optim\nfrom composer import profiler as profiler\nfrom composer import trainer as trainer\nfrom composer import utils as utils\nfrom composer.core import Algorithm as Algorithm\nfrom composer.core import Callback as Callback\nfrom composer.core import DataSpec as DataSpec\nfrom composer.core import Engine as Engine\nfrom composer.core import Event as Event\nfrom composer.core import Logger as Logger\nfrom composer.core import State as State\nfrom composer.core import Time as Time\nfrom composer.core import Timer as Timer\nfrom composer.core import TimeUnit as TimeUnit\nfrom composer.core import types as types\nfrom composer.trainer import Trainer as Trainer\n\n__version__ = \"0.3.1\"\n", "path": "composer/__init__.py"}]}