Remove fetch override and use original key error

lib/smart_kv.rb

@@ -1,11 +1,9 @@
 require_relative "smart_kv/version"
 require_relative "smart_kv/register"
 require_relative "smart_kv/errors"
-require_relative "smart_kv/fetch_override"
 
 class SmartKv
   extend Register
-  using FetchOverride
 
   attr_reader :object_class
 
@@ -18,7 +16,7 @@ def initialize(required_keys = [], optional_keys = [], object_class = nil, kv =
     hash = kv.to_h
     missing_keys = required_keys - hash.keys
     unless missing_keys.empty?
-      raise KeyError, "missing required key(s): #{missing_keys.map{|k| k.to_sym.inspect }.join(', ')} in #{self.class}"
+      raise ::KeyError, "missing required key(s): #{missing_keys.map{|k| k.to_sym.inspect }.join(', ')} in #{self.class}"
     end
 
     unrecognized_keys = hash.keys - required_keys - optional_keys

lib/smart_kv/errors.rb

@@ -1,4 +1,3 @@
 class SmartKv
   InitializationError = Class.new(StandardError)
-  KeyError = Class.new(StandardError)
 end

lib/smart_kv/version.rb

@@ -1,3 +1,3 @@
 class SmartKv
-  VERSION = "0.2.0"
+  VERSION = "0.2.1"
 end

spec/smart_kv_spec.rb

@@ -35,7 +35,7 @@ class ModelConfig < described_class
         ModelConfig.new({
           a_key: "value", and_another: "value again"
         })
-      }.to raise_error(SmartKv::KeyError, /missing required key\(s\): :another_key/)
+      }.to raise_error(KeyError, /missing required key\(s\): :another_key/)
     end
 
     it "doesn't complain when all required keys are there" do
@@ -52,7 +52,7 @@ class ModelConfig < described_class
           a_key: "value", c_key: "value again",
           another_key: "wow.. value", and_another: "excellent"
         })
-      }.to raise_error(SmartKv::KeyError, /key not found: :c_key.*Did you mean\?/m)
+      }.to raise_error(KeyError, /key not found: :c_key.*Did you mean\?/m)
     end
 
     it "can access the input value from the object" do
@@ -225,7 +225,7 @@ class ConvertableConfig
           end
 
           it "the instance will be callable as instance of Struct" do
-            config = ConvertableConfig.new(OstructKv)
+            config = ConvertableConfig.new(OstructKv) 
             expect { config.some_key }.not_to raise_error
             expect(config.some_key).to eq "value"
             expect(config.members).to eq [:some_key]
@@ -330,7 +330,7 @@ class OptionalToRequired < SmartKv
       it "makes the keys no longer required but allowed (optional)" do
         expect {
           OptionalToRequired.new
-        }.to raise_error(SmartKv::KeyError, /missing required key\(s\): :b_key/)
+        }.to raise_error(KeyError, /missing required key\(s\): :b_key/)
         expect(OptionalToRequired.optional_keys).to be_empty
         expect(OptionalToRequired.required_keys).to eq [:b_key]
       end