pub trait Function: Identified + Documented + OrderedParameterized + DowncastSync + Display + Debug + Send + Sync {
    // Required methods
    fn return_type(&self) -> &DataType;
    fn function(&self) -> fn(_: Vec<Value>) -> Value;
    fn as_identified(&self) -> Arc<dyn Identified>;
    fn as_ordered_parameterized(&self) -> Arc<dyn OrderedParameterized>;
}

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impl dyn Function

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pub fn is<__T: Function>(&self) -> bool

Returns true if the trait object wraps an object of type __T.

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pub fn downcast<__T: Function>(self: Box<Self>) -> Result<Box<__T>, Box<Self>>

Returns a boxed object from a boxed trait object if the underlying object is of type __T. Returns the original boxed trait if it isn’t.

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pub fn downcast_rc<__T: Function>(self: Rc<Self>) -> Result<Rc<__T>, Rc<Self>>

Returns an Rc-ed object from an Rc-ed trait object if the underlying object is of type __T. Returns the original Rc-ed trait if it isn’t.

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pub fn downcast_ref<__T: Function>(&self) -> Option<&__T>

Returns a reference to the object within the trait object if it is of type __T, or None if it isn’t.

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pub fn downcast_mut<__T: Function>(&mut self) -> Option<&mut __T>

Returns a mutable reference to the object within the trait object if it is of type __T, or None if it isn’t.

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pub fn downcast_arc<__T>(self: Arc<Self>) -> Result<Arc<__T>, Arc<Self>>
where __T: Any + Send + Sync + Function,

Returns an Arc-ed object from an Arc-ed trait object if the underlying object is of type __T. Returns the original Arc-ed trait if it isn’t.

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