pub trait FocusNodesOps<S: SRDFBasic> {
// Required method
fn focus_nodes(&self, store: &S, runner: &dyn Engine<S>) -> FocusNodes<S>;
}
pub trait FocusNodesOps<S: SRDFBasic> {
// Required method
fn focus_nodes(&self, store: &S, runner: &dyn Engine<S>) -> FocusNodes<S>;
}