lib/dry/configurable/extension.rb in dry-configurable-1.1.0 vs lib/dry/configurable/extension.rb in dry-configurable-1.2.0

@@ -24,21 +24,19 @@
         klass.instance_variable_set(:@__config_extension__, self)
       end
 
       # @api private
       def included(klass)
-        raise AlreadyIncludedError if klass.include?(InstanceMethods)
-
         super
 
         klass.class_eval do
           extend(ClassMethods)
           include(InstanceMethods)
           prepend(Initializer)
 
           class << self
-            undef :config
-            undef :configure
+            undef :config if method_defined?(:config)
+            undef :configure if method_defined?(:configure)
           end
         end
 
         klass.instance_variable_set(:@__config_extension__, self)
       end