Function create_script_instance 

pub unsafe fn create_script_instance<T: ScriptInstance>(
    rust_instance: T,
    for_object: Gd<T::Base>,
) -> RawPtr<*mut c_void>

Creates a raw pointer to a Godot script instance, from a Rust ScriptInstance object.

See ScriptInstance for usage. Discarding the resulting value will result in a memory leak.

The exact GDExtension type of the pointer is sys::GDExtensionScriptInstancePtr, but you can treat it like an opaque pointer.

Safety

The caller must ensure that for_object is not freed before passing the returned pointer back to Godot.