Description
It could be interesting to have a mixed mode for separator configurations, allowing us to use dots for objects and parentheses for array indexes, as in the following example:
'simple_object.my_key: 'title'
'simple_object.my_list[0]': True,
'langs[0].id': 666,
'langs[0].title': 'title',
'langs[0].description': 'description',
'langs[0].language': "language",
'langs[1].id': 4566,
'langs[1].title': 'title1',
'langs[1].description': 'description1',
'langs[1].language': "language1"