def get_immutability_policy(<EOL>self, resource_group_name, account_name, container_name, if_match=None, custom_headers=None, raw=False, **operation_config):
<EOL>url = self.get_immutability_policy.metadata['<STR_LIT:url>']<EOL>path_format_arguments = {<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", resource_group_name, '<STR_LIT:str>', max_length=<NUM_LIT>, min_length=<NUM_LIT:1>, pattern=r'<STR_LIT>'),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", account_name, '<STR_LIT:str>', max_length=<NUM_LIT>, min_length=<NUM_LIT:3>),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", container_name, '<STR_LIT:str>', max_length=<NUM_LIT>, min_length=<NUM_LIT:3>),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", self.immutability_policy_name, '<STR_LIT:str>'),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", self.config.subscription_id, '<STR_LIT:str>', min_length=<NUM_LIT:1>)<EOL>}<EOL>url = self._client.format_url(url, **path_format_arguments)<EOL>query_parameters = {}<EOL>query_parameters['<STR_LIT>'] = self._serialize.query("<STR_LIT>", self.api_version, '<STR_LIT:str>', min_length=<NUM_LIT:1>)<EOL>header_parameters = {}<EOL>header_parameters['<STR_LIT>'] = '<STR_LIT:application/json>'<EOL>if self.config.generate_client_request_id:<EOL><INDENT>header_parameters['<STR_LIT>'] = str(uuid.uuid1())<EOL><DEDENT>if custom_headers:<EOL><INDENT>header_parameters.update(custom_headers)<EOL><DEDENT>if if_match is not None:<EOL><INDENT>header_parameters['<STR_LIT>'] = self._serialize.header("<STR_LIT>", if_match, '<STR_LIT:str>')<EOL><DEDENT>if self.config.accept_language is not None:<EOL><INDENT>header_parameters['<STR_LIT>'] = self._serialize.header("<STR_LIT>", self.config.accept_language, '<STR_LIT:str>')<EOL><DEDENT>request = self._client.get(url, query_parameters, header_parameters)<EOL>response = self._client.send(request, stream=False, **operation_config)<EOL>if response.status_code not in [<NUM_LIT:200>]:<EOL><INDENT>exp = CloudError(response)<EOL>exp.request_id = response.headers.get('<STR_LIT>')<EOL>raise exp<EOL><DEDENT>deserialized = None<EOL>header_dict = {}<EOL>if response.status_code == <NUM_LIT:200>:<EOL><INDENT>deserialized = self._deserialize('<STR_LIT>', response)<EOL>header_dict = {<EOL>'<STR_LIT>': '<STR_LIT:str>',<EOL>}<EOL><DEDENT>if raw:<EOL><INDENT>client_raw_response = ClientRawResponse(deserialized, response)<EOL>client_raw_response.add_headers(header_dict)<EOL>return client_raw_response<EOL><DEDENT>return deserialized<EOL>
Gets the existing immutability policy along with the corresponding ETag
        in response headers and body.

        :param resource_group_name: The name of the resource group within the
         user's subscription. The name is case insensitive.
        :type resource_group_name: str
        :param account_name: The name of the storage account within the
         specified resource group. Storage account names must be between 3 and
         24 characters in length and use numbers and lower-case letters only.
        :type account_name: str
        :param container_name: The name of the blob container within the
         specified storage account. Blob container names must be between 3 and
         63 characters in length and use numbers, lower-case letters and dash
         (-) only. Every dash (-) character must be immediately preceded and
         followed by a letter or number.
        :type container_name: str
        :param if_match: The entity state (ETag) version of the immutability
         policy to update. A value of "*" can be used to apply the operation
         only if the immutability policy already exists. If omitted, this
         operation will always be applied.
        :type if_match: str
        :param dict custom_headers: headers that will be added to the request
        :param bool raw: returns the direct response alongside the
         deserialized response
        :param operation_config: :ref:`Operation configuration
         overrides<msrest:optionsforoperations>`.
        :return: ImmutabilityPolicy or ClientRawResponse if raw=true
        :rtype: ~azure.mgmt.storage.v2018_07_01.models.ImmutabilityPolicy or
         ~msrest.pipeline.ClientRawResponse
        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`