prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  StaticFilesConfig and virtual directories
  I'm trying to write a ``FileSystemProtocol`` to load files from the package data using [importlib_resources](https://importlib-resources.readthedocs.io/en/latest/using.html#). But because ``directories`` is defined as ``DirectoryPath``, pydantic checks if the given directories exist in the local filesystem. 
  
  This is not generally true, especially in any kind of virtual filesystem (e.g. a zipped package). I think this condition should be relaxed to support virtual filesystems.
  
  https://github.com/starlite-api/starlite/blob/9bb6dcd57c10a591377cf8e3a537e9292566d5b9/starlite/config/static_files.py#L32
  
  </issue>
  <code>
  [start of litestar/dto/exceptions.py]
  1 from __future__ import annotations
  2 
  3 from litestar.exceptions import ImproperlyConfiguredException
  4 
  5 __all__ = ("DTOException", "UnsupportedType")
  6 
  7 
  8 class DTOException(ImproperlyConfiguredException):
  9     """Base exception for DTO errors."""
  10 
  11 
  12 class UnsupportedType(DTOException):
  13     """Raised when a type is not supported by Litestar."""
  14
  [end of litestar/dto/exceptions.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/litestar/dto/exceptions.py b/litestar/dto/exceptions.py
  deleted file mode 100644
  --- a/litestar/dto/exceptions.py
  +++ /dev/null
  @@ -1,13 +0,0 @@
  -from __future__ import annotations
  -
  -from litestar.exceptions import ImproperlyConfiguredException
  -
  -__all__ = ("DTOException", "UnsupportedType")
  -
  -
  -class DTOException(ImproperlyConfiguredException):
  -    """Base exception for DTO errors."""
  -
  -
  -class UnsupportedType(DTOException):
  -    """Raised when a type is not supported by Litestar."""
  
verification_info: {"golden_diff": "diff --git a/litestar/dto/exceptions.py b/litestar/dto/exceptions.py\ndeleted file mode 100644\n--- a/litestar/dto/exceptions.py\n+++ /dev/null\n@@ -1,13 +0,0 @@\n-from __future__ import annotations\n-\n-from litestar.exceptions import ImproperlyConfiguredException\n-\n-__all__ = (\"DTOException\", \"UnsupportedType\")\n-\n-\n-class DTOException(ImproperlyConfiguredException):\n-    \"\"\"Base exception for DTO errors.\"\"\"\n-\n-\n-class UnsupportedType(DTOException):\n-    \"\"\"Raised when a type is not supported by Litestar.\"\"\"\n", "issue": "StaticFilesConfig and virtual directories\nI'm trying to write a ``FileSystemProtocol`` to load files from the package data using [importlib_resources](https://importlib-resources.readthedocs.io/en/latest/using.html#). But because ``directories`` is defined as ``DirectoryPath``, pydantic checks if the given directories exist in the local filesystem. \r\n\r\nThis is not generally true, especially in any kind of virtual filesystem (e.g. a zipped package). I think this condition should be relaxed to support virtual filesystems.\r\n\r\nhttps://github.com/starlite-api/starlite/blob/9bb6dcd57c10a591377cf8e3a537e9292566d5b9/starlite/config/static_files.py#L32\n", "before_files": [{"content": "from __future__ import annotations\n\nfrom litestar.exceptions import ImproperlyConfiguredException\n\n__all__ = (\"DTOException\", \"UnsupportedType\")\n\n\nclass DTOException(ImproperlyConfiguredException):\n    \"\"\"Base exception for DTO errors.\"\"\"\n\n\nclass UnsupportedType(DTOException):\n    \"\"\"Raised when a type is not supported by Litestar.\"\"\"\n", "path": "litestar/dto/exceptions.py"}]}