Underscore.js Collections: Reject

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var arr = [{"id":"de36d9ab-7c02-43e1-ba09-9abe6272961c","ObjectId":"4ab4df0b-067e-46af-8e36-ca88d94b0caf","text":"A1 Grubu","ParentId":null,"TypeId":2,"children":[{"id":"1d479bc4-0850-493f-a9e1-a24482f41e22","ObjectId":"2b5058d0-9398-4774-aba9-8d0dd07dda7f","text":"Insured-HSBC - Insured-HSBC","ParentId":"4ab4df0b-067e-46af-8e36-ca88d94b0caf","TypeId":1,"children":null,"CheckState":"unchecked"},{"id":"0122a015-63ad-4196-9391-522278dd7035","ObjectId":"2c789eee-826e-46eb-8f47-8d38eaa1dfe7","text":"TL-AZYE - TL-AZYE","ParentId":"4ab4df0b-067e-46af-8e36-ca88d94b0caf","TypeId":1,"children":null,"CheckState":"unchecked"},{"id":"59acde60-8f4f-4966-bf92-2be0fee0d63f","ObjectId":"dc3a557b-a06a-4a37-a6cf-ca19cda7c327","text":"USD-AZYE - USD-AZYE","ParentId":"4ab4df0b-067e-46af-8e36-ca88d94b0caf","TypeId":1,"children":null,"CheckState":"unchecked"},{"id":"d8f2f9c2-fc72-4c86-b58c-85699ad05d44","ObjectId":"1e7c9fc7-5101-4097-ad14-cc9dcf94cb16","text":"TL2-AZYE - TL2-AZYE","ParentId":"4ab4df0b-067e-46af-8e36-ca88d94b0caf","TypeId":1,"children":null,"CheckState":"unchecked"}],"CheckState":"unchecked"},{"id":"ab7fe2d4-0c58-4aa4-bc5c-d0723025240c","ObjectId":"5efa5bbd-2a49-4fc8-8408-21ff33cddf70","text":"A2 Grubu","ParentId":null,"TypeId":2,"children":[{"id":"604c8ac3-2ce5-4759-942e-3ca385cd8b0b","ObjectId":"7d0c1b7c-b8af-4615-a38f-e41454613365","text":"a2","ParentId":"5efa5bbd-2a49-4fc8-8408-21ff33cddf70","TypeId":2,"children":[{"id":"576a111d-e0de-4972-bc04-1282a4e74cad","ObjectId":"e130d258-3984-4f92-b3e7-213db65ed9b9","text":"Company-AZYE - Company-AZYE","ParentId":"7d0c1b7c-b8af-4615-a38f-e41454613365","TypeId":1,"children":null,"CheckState":"unchecked"},{"id":"293260fe-347d-4e6c-8462-75b3959128de","ObjectId":"013dae95-bac3-4ddd-b87c-28069c689d86","text":"EUR -...