/** References to two different atoms. * Available for any reference to atoms but normally will be the normal reference attribute on the bond element. The order of atoms is preserved and may matter for some conventions (e.g. wedge/hatch or donor bonds. * @return String[] */ public String[] getAtomRefs2() { StringArraySTAttribute att = (StringArraySTAttribute) this.getAtomRefs2Attribute(); if (att == null) { return null; } return att.getStringArray(); } /** References to two different atoms.