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<?phpnamespace Aws\Api;
 
 /**
 * Represents a list shape.
 */
 class ListShape extends Shape
 {
 private $member;
 
 public function __construct(array $definition, ShapeMap $shapeMap)
 {
 $definition['type'] = 'list';
 parent::__construct($definition, $shapeMap);
 }
 
 /**
 * @return Shape
 * @throws \RuntimeException if no member is specified
 */
 public function getMember()
 {
 if (!$this->member) {
 if (!isset($this->definition['member'])) {
 throw new \RuntimeException('No member attribute specified');
 }
 $this->member = Shape::create(
 $this->definition['member'],
 $this->shapeMap
 );
 }
 
 return $this->member;
 }
 }
 
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