Function slint_interpreter_component_instance_invoke 

#[unsafe(no_mangle)]
pub extern "C" fn slint_interpreter_component_instance_invoke(
    inst: &ErasedItemTreeBox,
    name: Slice<'_, u8>,
    args: Slice<'_, Box<Value>>,
) -> *mut Value

Available on crate feature ffi only.

Invoke a callback or function. Returns raw boxed value on success and null ptr on failure.