static String accessPseudoLabel(IPseudoAtom atom, String defaultLabel) {
        String label = atom.getLabel();
        if (label != null && !label.isEmpty()) return label;
        return defaultLabel;
    }
static String accessPseudoLabel ( IPseudoAtom atom , String defaultLabel ) { String label = atom . getLabel ( ) ; if ( label != null && ! label . isEmpty ( ) ) return label ; return defaultLabel ; }
Safely access the label of a pseudo atom. If the label is null or empty, the default label is
returned.

@param atom the pseudo
@return pseudo label