Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php  | 
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| 35 | class RoboFile extends \Robo\Tasks  | 
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| 36 | { | 
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| 37 | |||
| 38 | /**  | 
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| 39 | * The build properties.  | 
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| 40 | *  | 
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| 41 | * @var array  | 
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| 42 | */  | 
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| 43 | protected $properties = array(  | 
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| 44 | 'base.dir' => __DIR__,  | 
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| 45 | 'src.dir' => __DIR__ . '/src',  | 
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| 46 | 'dist.dir' => __DIR__ . '/dist',  | 
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| 47 | 'vendor.dir' => __DIR__ . '/vendor',  | 
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| 48 | 'target.dir' => __DIR__ . '/target'  | 
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| 49 | );  | 
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| 50 | |||
| 51 | /**  | 
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| 52 | * Run's the composer install command.  | 
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| 53 | *  | 
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| 54 | * @return \Robo\Result The result  | 
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| 55 | */  | 
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| 56 | public function composerInstall()  | 
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| 64 | |||
| 65 | /**  | 
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| 66 | * Run's the composer update command.  | 
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| 67 | *  | 
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| 68 | * @return \Robo\Result The result  | 
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| 69 | */  | 
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| 70 | public function composerUpdate()  | 
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| 78 | |||
| 79 | /**  | 
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| 80 | * Clean up the environment for a new build.  | 
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| 81 | *  | 
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| 82 | * @return \Robo\Result The result  | 
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| 83 | */  | 
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| 84 | public function clean()  | 
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| 88 | |||
| 89 | /**  | 
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| 90 | * Prepare's the environment for a new build.  | 
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| 91 | *  | 
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| 92 | * @return \Robo\Result The result  | 
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| 93 | */  | 
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| 94 | public function prepare()  | 
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| 102 | |||
| 103 | /**  | 
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| 104 | * Run's the PHPMD.  | 
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| 105 | *  | 
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| 106 | * @return \Robo\Result The result  | 
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| 107 | */  | 
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| 108 | View Code Duplication | public function runMd()  | 
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| 121 | |||
| 122 | /**  | 
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| 123 | * Run's the PHPCPD.  | 
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| 124 | *  | 
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| 125 | * @return \Robo\Result The result  | 
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| 126 | */  | 
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| 127 | View Code Duplication | public function runCpd()  | 
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| 140 | |||
| 141 | /**  | 
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| 142 | * Run's the PHPCodeSniffer.  | 
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| 143 | *  | 
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| 144 | * @return \Robo\Result The result  | 
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| 145 | */  | 
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| 146 | View Code Duplication | public function runCs()  | 
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| 159 | |||
| 160 | /**  | 
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| 161 | * Run's the PHPUnit tests.  | 
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| 162 | *  | 
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| 163 | * @return \Robo\Result The result  | 
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| 164 | */  | 
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| 165 | public function runTests()  | 
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| 166 |     { | 
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| 167 | |||
| 168 | // run PHPUnit  | 
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| 169 |         return $this->taskPHPUnit(sprintf('%s/bin/phpunit', $this->properties['vendor.dir'])) | 
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| 170 |              ->configFile('phpunit.xml') | 
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| 171 | ->run();  | 
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| 172 | }  | 
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| 173 | |||
| 174 | /**  | 
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| 175 | * The complete build process.  | 
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| 176 | *  | 
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| 177 | * @return void  | 
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| 178 | */  | 
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| 179 | public function build()  | 
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| 193 | }  | 
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| 194 | 
It seems like the method you are trying to call exists only in some of the possible types.
Let’s take a look at an example:
Available Fixes
Add an additional type-check:
Only allow a single type to be passed if the variable comes from a parameter: