expose attribute helper names

lib/support_table_data.rb

@@ -79,6 +79,15 @@ def named_instance_attribute_helpers(*attributes)
       define_support_table_named_instances
     end
 
+    # Get the names of any named instance attribute helpers that have been defined
+    # with `named_instance_attribute_helpers`.
+    #
+    # @return [Array<String>] List of attribute names.
+    def support_table_attribute_helpers
+      @support_table_attribute_helpers ||= {}
+      @support_table_attribute_helpers.keys
+    end
+
     # Get the data for the support table from the data files.
     #
     # @return [Array<Hash>] List of attributes for all records in the data files.

spec/support_table_data_spec.rb

@@ -148,6 +148,11 @@
       expect(Group.secondary_name).to eq "secondary"
       expect(Group.gray_name).to eq "gray"
     end
+
+    it "can get a list of the defined attribute helpers" do
+      expect(Group.support_table_attribute_helpers).to match_array ["group_id", "name"]
+      expect(Color.support_table_attribute_helpers).to match_array []
+    end
   end
 
   describe "protected_instance?" do