Added "get_property()" class method to the ContainsMetadata class

Author: apdavison

fairgraph/base.py

@@ -157,6 +157,10 @@ def __setattr__(self, name, value):
             prop.check_value(value)
             super().__setattr__(name, value)
 
+    @classmethod
+    def get_property(cls, name):
+        return cls._property_lookup[name]
+
     def to_jsonld(
         self,
         normalized: bool = True,