Function init_soft_body_clusters 

pub fn init_soft_body_clusters(
    commands: Commands<'_, '_>,
    context_access: Query<'_, '_, (&mut RapierRigidBodySet, &mut RapierContextColliders)>,
    links: Query<'_, '_, &RapierContextEntityLink>,
    clusters: Query<'_, '_, (Entity, &SoftBodyCluster), Without<RapierRigidBodyHandle>>,
)

System responsible for creating the proxy rigid-bodies of new SoftBodyCluster components.