def get_content_metadata_item_id(content_metadata_item):
if content_metadata_item['<STR_LIT>'] == '<STR_LIT>':<EOL><INDENT>return content_metadata_item['<STR_LIT>']<EOL><DEDENT>return content_metadata_item['<STR_LIT:key>']<EOL>
Return the unique identifier given a content metadata item dictionary.