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# Mutation ops Five record types describe every change to the native view tree: create, update, insert, destroy, and set frame. The [`Reconciler`][pythonnative.reconciler.Reconciler] emits them; the view backend from [`get_backend`][pythonnative.native_views.get_backend] applies them in one `apply_mutations` call per commit. ::: pythonnative.mutations options: show_root_heading: false show_root_toc_entry: false members_order: source filters: ["!^_"] ## Next steps - See where the callables stripped from these payloads go in [Events](events.md). - See how each op is applied to a concrete widget in [Native views](native_views.md). - Read what component managers size themselves against in [Platform metrics](platform_metrics.md). - Read the diffing pass that produces these lists in [Reconciliation](../concepts/reconciliation.md).