def collection_item(self, collection_name, identifier):
path = '<STR_LIT>'.format(collection_name, identifier)<EOL>url = self._build_url(path)<EOL>LOGGER.debug('<STR_LIT>'.format(url))<EOL>response = requests.get(url, headers=REQUEST_HEADERS).json()<EOL>return response<EOL>
implements Requirement 30 (/req/core/f-op)

@type collection_name: string
@param collection_name: name of collection
@type identifier: string
@param identifier: feature identifier

@returns: single feature result