You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: entity_builder.rs
    path of file: ./repos/feather/quill/api/src
    
    the code of the file until where you have to start completion: use std::marker::PhantomData;

use quill_common::Component;

use crate::{Entity, EntityId};

/// Builder for an entity.
///
/// Created via [`Game::create_entity_builder`](crate::Game::create_entity_builder).
///
/// Add components to the entity with [`EntityB
    
    pub fn add<T: Component>(&mut self, component: T) -> &mut Self {
        let host_component = T::host_component();
        let bytes = component.to_cow_bytes();
        unsafe {
            quill_sys::entity_builder_add_component(
                self.id,
                host_component,
                bytes.as_ptr().into(),
                bytes.len() as u32,
            );
        }
        self
    }