ENH: JsonSchemaExporter accepts do_not_create parameter.

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For #116 (closed) Insert a meaningful description for this merge request here: What is the new/changed behavior? Which bug has been fixed? Are there related issues?

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src/caosadvancedtools/models/data_model.py

@@ -262,3 +262,27 @@ class DataModel(dict):
                 all_ents[prop.name] = prop
 
         return list(all_ents.values())
+
+    def get_deep(self, name, visited: set = None):
+        """Attempt to resolve references for the given ``name``.
+
+        This methods only uses data which is available in this datamodel, which acts kind of like a
+        cache pool.
+        """
+        entity = self.get(name)
+        if not entity:
+            return entity
+        if not visited:
+            visited = set()
+
+        # new_props = []
+        for prop in list(entity.get_properties()):  # Make a change-resistant list copy.
+            if prop.name in visited:
+                continue
+            visited.add(prop.name)
+            if prop.name in self:
+                entity.remove_property(prop).add_property(self.get_deep(prop.name,
+                                                                        visited=visited))
+            else:
+                print(f"Referenced property \"{prop.name}\" not found in data model.")
+        return entity