Function ecs_get_mut_id 

pub unsafe extern "C" fn ecs_get_mut_id(
    world: *mut ecs_world_t,
    entity: ecs_entity_t,
    id: ecs_id_t,
) -> *mut c_void

Get a mutable pointer to a component. This operation returns a mutable pointer to a component. If the component did not yet exist, it will be added.

If get_mut is called when the world is in deferred/readonly mode, the function will:

• return a pointer to a temp storage if the component does not yet exist, or
• return a pointer to the existing component if it exists

@param world The world. @param entity The entity. @param id The entity id of the component to obtain. @return The component pointer.