next part of the docs and api documentation in beta ver

docs/api/relations/utils.md

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+<a name="relations.utils"></a>
+# relations.utils
+
+<a name="relations.utils.get_relations_sides_and_names"></a>
+#### get\_relations\_sides\_and\_names
+
+```python
+get_relations_sides_and_names(to_field: Type[BaseField], parent: "Model", child: "Model", child_name: str, virtual: bool, relation_name: str) -> Tuple["Model", "Model", str, str]
+```
+
+Determines the names of child and parent relations names, as well as
+changes one of the sides of the relation into weakref.proxy to model.
+
+**Arguments**:
+
+- `to_field (BaseField)`: field with relation definition
+- `parent (Model)`: parent model
+- `child (Model)`: child model
+- `child_name (str)`: name of the child
+- `virtual (bool)`: flag if relation is virtual
+- `relation_name ()`: 
+
+**Returns**:
+
+`(Tuple["Model", "Model", str, str])`: parent, child, child_name, to_name
+