Code Duplication    Length = 9-9 lines in 4 locations

src/Forms/FormField.php 2 locations

@@ 579-587 (lines=9) @@
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     *
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     * @return $this
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     */
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    public function addExtraClass($class)
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    {
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        $classes = preg_split('/\s+/', $class);
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        foreach ($classes as $class) {
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            $this->extraClasses[$class] = $class;
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        }
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        return $this;
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    }
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    /**
@@ 597-605 (lines=9) @@
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     *
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     * @return $this
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     */
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    public function removeExtraClass($class)
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    {
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        $classes = preg_split('/\s+/', $class);
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        foreach ($classes as $class) {
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            unset($this->extraClasses[$class]);
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        }
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        return $this;
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    }
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    /**

src/Forms/Form.php 2 locations

@@ 1734-1742 (lines=9) @@
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     *              names delimited by a single space.
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     * @return $this
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     */
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    public function addExtraClass($class)
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    {
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        //split at white space
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        $classes = preg_split('/\s+/', $class);
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        foreach ($classes as $class) {
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            //add classes one by one
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            $this->extraClasses[$class] = $class;
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        }
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        return $this;
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    }
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    /**
@@ 1752-1760 (lines=9) @@
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     * @param string $class
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     * @return $this
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     */
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    public function removeExtraClass($class)
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    {
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        //split at white space
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        $classes = preg_split('/\s+/', $class);
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        foreach ($classes as $class) {
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            //unset one by one
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            unset($this->extraClasses[$class]);
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        }
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        return $this;
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    }
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    public function debug()