Derive Macro ComponentStorage 

#[derive(ComponentStorage)]
{
    // Attributes available to this derive:
    #[component]
}

Derive macro for ComponentStorage that generates standard HashMap-based implementations.

Requires a #[component(field = "field_name")] attribute specifying the HashMap field in EntityRegistryInternal.

Example

#[derive(ComponentStorage)]
#[component(field = "names")]
pub struct Name(String);