def _get_integration_function_name(self, method_config):
if not isinstance(method_config, dict) or self._INTEGRATION_KEY not in method_config:<EOL><INDENT>return None<EOL><DEDENT>integration = method_config[self._INTEGRATION_KEY]<EOL>if integrationand isinstance(integration, dict)and integration.get("<STR_LIT:type>") == IntegrationType.aws_proxy.value:<EOL><INDENT>return LambdaUri.get_function_name(integration.get("<STR_LIT>"))<EOL><DEDENT>
Tries to parse the Lambda Function name from the Integration defined in the method configuration.
Integration configuration is defined under the special "x-amazon-apigateway-integration" key. We care only
about Lambda integrations, which are of type aws_proxy, and ignore the rest. Integration URI is complex and
hard to parse. Hence we do our best to extract function name out of integration URI. If not possible, we
return None.

Parameters
----------
method_config : dict
    Dictionary containing the method configuration which might contain integration settings

Returns
-------
string or None
    Lambda function name, if possible. None, if not.