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    deleteChild = defaction(pico_name){
      ent_children = children(){"children"}
      child_collection = ent_children.collect(function(child){
                                              (child{"name"} ==  pico_name) => "to_delete" | "dont_delete"
                                            })
      child_to_delete = child_collection{"to_delete"}.head()

      every {
        engine:removePico(child_to_delete{"id"})
      }
      returnsreturn
      {
        "updated_children": child_collection{"dont_delete"},
        "child": child_to_delete
      }
    }