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    <?php
/**
 * PHP-DI
 *
 * @link      http://php-di.org/
 * @copyright Matthieu Napoli (http://mnapoli.fr/)
 * @license   http://www.opensource.org/licenses/mit-license.php MIT (see the LICENSE file)
 */

namespace DI\Definition\Source;

use DI\Definition\Definition;
use DI\Definition\Exception\DefinitionException;
use DI\Definition\MergeableDefinition;

/**
 * Source of definitions for entries of the container.
 *
 * @author Matthieu Napoli <matthieu@mnapoli.fr>
 */
interface DefinitionSource
{
    /**
     * Returns the DI definition for the entry name.
     *
     * @param string                   $name
     * @param MergeableDefinition|null $parentDefinition Given if a definition already exists
     *                                                   and we are supposed to enrich it.
     *
     * @throws DefinitionException An invalid definition was found.
     * @return Definition|null
     */
    public function getDefinition($name, MergeableDefinition $parentDefinition = null);
}