Hydrate array object property with multiple fields

Questions Components & MVC
1

Hello!
I’m struggling a bit to properly hydrate an object property ( $collaborators )

class MyObject {
  /* .. normal fields successfully hydrated with ReflectionHydrator ..*/

  protected $collaborators; // The property idk how to hydrate ( should be an array )

  /* .. other normal fields .. */
}

the problem is that my input data (from csv) is like:

$data = [
  /* .. */
  'collaborator_1' = 'foo'
  'collaborator_2' = 'bar'
  /* .. and more collaborators */
  /* .. */
];

The solution i came up with is adding a key ‘collaborators’ directly to $data and fill it with everything that preg_match can find but i feel it can be done better with a Strategy.

Does anyone have any hints?