##### SUMMARY
`docker_container` should so some sanity checks that not two volumes / mount points use the same target inside the container, so that especially when recreating containers, they won't be destroyed first before recreating fails.

This becomes more important once #49808 is merged.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
docker_container

##### ANSIBLE VERSION
```
2.8.0
```

if key_main is None:
                    if key_main in all_options:
                        self.fail("The module option '%s' cannot be specified in the comparisons dict, "
                                  "since it does not correspond to container's state!" % key)
                    self.fail("Unknown module option '%s' in comparisons dict!" % key)
                if key_main in comp_aliases_used:
                    self.fail("Both '%s' and '%s' (aliases of %s) are specified in comparisons dict!" % (key, comp_aliases_used[key_main], key_main))
                comp_aliases_used[key_main] = key
                
                if value in ('strict', 'ignore'):
                    comparisons[key_main]['comparison'] = value
                elif value == 'allow_more_present':
                    if comparisons[key_main]['type'] == 'value':
                        self.fail("Option '%s' is a value and not a set/list/dict, so its comparison cannot be %s" % (key, value))
                    comparisons[key_main]['comparison'] = value
                else:
                    self.fail("Unknown comparison mode '%s'!" % value)
        
        comparisons['publish_all_ports'] = dict(type='value', comparison='strict', name='published_ports')
        comparisons['expected_ports'] = dict(type='dict', comparison=comparisons['published_ports']['comparison'], name='expected_ports')
        comparisons['disable_healthcheck'] = dict(type='value',
                                                  comparison='ignore' if comparisons['healthcheck']['comparison'] == 'ignore' else 'strict',
                                                  name='disable_healthcheck')
        
        if self.module.params['ignore_image'] and comparisons['image']['comparison'] != 'ignore':
            self.module.warn('The ignore_image option has been overridden by the comparisons option!')
        if self.module.params['purge_networks'] and comparisons['networks']['comparison'] != 'strict':
            self.module.warn('The purge_networks option has been overridden by the comparisons option!')
        self.comparisons = comparisons
    def _get_additional_minimal_versions(self):