silverstripe-blog/code/admin/GridFieldFormAction.php

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<?php
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class GridFieldFormAction extends GridField_FormAction
{
/**
* @var array
*/
protected $extraAttributes = array();
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/**
* @param array $attributes
*/
public function setExtraAttributes(array $attributes)
{
$this->extraAttributes = $attributes;
}
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/**
* @return array
*/
public function getAttributes()
{
$attributes = parent::getAttributes();
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return array_merge(
$attributes,
$this->extraAttributes
);
}
}