diff --git a/lib/qonfig/data_set.rb b/lib/qonfig/data_set.rb
index f0e40172..8bdbec9e 100644
--- a/lib/qonfig/data_set.rb
+++ b/lib/qonfig/data_set.rb
@@ -82,6 +82,19 @@ def frozen?
     thread_safe_access { settings.__is_frozen__ }
   end
 
+  # @param keys [Array<String,Symbol>]
+  # @option sttings [Hash<String|Symbol,Any>]
+  # @param configurations [Block]
+  # @return [Qonfig::DataSet]
+  #
+  # @api public
+  # @since 0.1.0
+  def sub_config(*keys, settings: {}, &configurations)
+    thread_safe_access do
+      # TODO: realize
+    end
+  end
+
   # @param settings_map [Hash]
   # @param configurations [Proc]
   # @return [void]
diff --git a/qonfig.gemspec b/qonfig.gemspec
index ba690c3a..23858295 100644
--- a/qonfig.gemspec
+++ b/qonfig.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'simplecov',        '~> 0.18'
   spec.add_development_dependency 'rspec',            '~> 3.9'
-  spec.add_development_dependency 'armitage-rubocop', '~> 0.79'
+  spec.add_development_dependency 'armitage-rubocop', '~> 0.80'
 
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake', '>= 13'
diff --git a/spec/features/plugins/toml/save_to_toml_spec.rb b/spec/features/plugins/toml/save_to_toml_spec.rb
index 1d9107c2..9f886279 100644
--- a/spec/features/plugins/toml/save_to_toml_spec.rb
+++ b/spec/features/plugins/toml/save_to_toml_spec.rb
@@ -79,7 +79,6 @@
 
     context 'config with supported toml types' do
       let(:config) do
-        # rubocop:disable Style/BracesAroundHashParameters
         Class.new(Qonfig::DataSet) do
           setting :true_boolean, true
           setting :false_boolean, false
@@ -90,7 +89,6 @@
           setting :collection, [%w[1 2], [3, 4], [true, false], []]
           setting :time, Time.utc(2031, 0o5, 27, 0o7, 32, 0)
         end.new
-        # rubocop:enable Style/BracesAroundHashParameters
       end
 
       specify 'correctly represents YAML data types' do
diff --git a/spec/features/save_to_file/save_to_json_spec.rb b/spec/features/save_to_file/save_to_json_spec.rb
index 545665dd..f3679403 100644
--- a/spec/features/save_to_file/save_to_json_spec.rb
+++ b/spec/features/save_to_file/save_to_json_spec.rb
@@ -90,7 +90,6 @@
     let(:config_file_name) { "#{SecureRandom.uuid}.json" }
     let(:config_file_path) { SpecSupport.artifact_path(config_file_name) }
     let(:config_klass) do
-      # rubocop:disable Style/BracesAroundHashParameters
       Class.new(Qonfig::DataSet) do
         setting :true_bollean, true
         setting :false_boolean, false
@@ -99,7 +98,6 @@
         setting :null_data, nil
         setting :collection, ['1', 2, true, false, nil, [], {}]
       end
-      # rubocop:enable Style/BracesAroundHashParameters
     end
     let(:config) { config_klass.new }
 
diff --git a/spec/features/save_to_file/save_to_yaml_spec.rb b/spec/features/save_to_file/save_to_yaml_spec.rb
index 406908f4..ef31ac2c 100644
--- a/spec/features/save_to_file/save_to_yaml_spec.rb
+++ b/spec/features/save_to_file/save_to_yaml_spec.rb
@@ -111,7 +111,6 @@
     let(:config_file_name) { "#{SecureRandom.uuid}.yml" }
     let(:config_file_path) { SpecSupport.artifact_path(config_file_name) }
     let(:config_klass) do
-      # rubocop:disable Style/BracesAroundHashParameters
       Class.new(Qonfig::DataSet) do
         setting :true_bollean, true
         setting :false_boolean, false
@@ -120,7 +119,6 @@
         setting :null_data, nil
         setting :collection, ['1', 2, true, false, nil, [], {}]
       end
-      # rubocop:enable Style/BracesAroundHashParameters
     end
     let(:config) { config_klass.new }