##### 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
```

'''
        Turn tmpfs into a hash of Tmpfs objects
        '''
        result = dict()
        if self.tmpfs is None:
            return result
        for tmpfs_spec in self.tmpfs:
            split_spec = tmpfs_spec.split(":", 1)
            if len(split_spec) > 1:
                result[split_spec[0]] = split_spec[1]
            else:
                result[split_spec[0]] = ""
        return result
    def _get_environment(self):