> ## Documentation Index > Fetch the complete documentation index at: https://gofastmcp.com/llms.txt > Use this file to discover all available pages before exploring further. # prefab # `fastmcp.utilities.prefab` Lazy helpers for FastMCP's optional Prefab UI integration. ## Functions ### `prefab_available` ```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}} prefab_available() -> bool ``` Return whether Prefab UI is installed without importing it. ### `is_prefab_type` ```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}} is_prefab_type(candidate: Any) -> bool ``` Return whether a type is a Prefab app or component type. ### `is_prefab_app` ```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}} is_prefab_app(value: Any) -> bool ``` Return whether a value is a Prefab app. ### `is_prefab_component` ```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}} is_prefab_component(value: Any) -> bool ``` Return whether a value is a Prefab component. ### `prefab_app_from_component` ```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}} prefab_app_from_component(component: Any) -> Any ``` Wrap a Prefab component in a Prefab app.