@@ -400,7 +400,7 @@  | 
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| 400 | 400 | *  | 
                                                        
| 401 | 401 | * @since 0.1  | 
                                                        
| 402 | 402 | *  | 
                                                        
| 403 | - * @param int|string $index  | 
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| 403 | + * @param integer|null $index  | 
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| 404 | 404 | * @param mixed $value  | 
                                                        
| 405 | 405 | */  | 
                                                        
| 406 | 406 |  	public function offsetSet( $index, $value ) { | 
                                                        
@@ -175,6 +175,9 @@  | 
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| 175 | 175 | $this->doTestDiff( new CallbackListDiffer( $callback ), $old, $new, $expected, $message );  | 
                                                        
| 176 | 176 | }  | 
                                                        
| 177 | 177 | |
| 178 | + /**  | 
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| 179 | + * @param string $message  | 
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| 180 | + */  | 
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| 178 | 181 |  	private function doTestDiff( Differ $differ, $old, $new, $expected, $message ) { | 
                                                        
| 179 | 182 | $actual = $differ->doDiff( $old, $new );  | 
                                                        
| 180 | 183 | |
@@ -224,6 +224,9 @@  | 
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| 224 | 224 | $this->doTestDiff( new ListDiffer( new NativeArrayComparer() ), $old, $new, $expected, $message );  | 
                                                        
| 225 | 225 | }  | 
                                                        
| 226 | 226 | |
| 227 | + /**  | 
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| 228 | + * @param string $message  | 
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| 229 | + */  | 
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| 227 | 230 |  	private function doTestDiff( Differ $differ, $old, $new, $expected, $message ) { | 
                                                        
| 228 | 231 | $actual = $differ->doDiff( $old, $new );  | 
                                                        
| 229 | 232 | |
@@ -248,6 +248,9 @@  | 
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| 248 | 248 | );  | 
                                                        
| 249 | 249 | }  | 
                                                        
| 250 | 250 | |
| 251 | + /**  | 
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| 252 | + * @param string $message  | 
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| 253 | + */  | 
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| 251 | 254 |  	private function doTestDiff( Differ $differ, $old, $new, $expected, $message ) { | 
                                                        
| 252 | 255 | $actual = $differ->doDiff( $old, $new );  | 
                                                        
| 253 | 256 | |