protected Set<String> getModifications(Match m, String memLabel, String comLabel)
	{
		PhysicalEntityChain chain = getChain(m, memLabel, comLabel);
		return toStringSet(chain.getModifications());
	}
protected Set < String > getModifications ( Match m , String memLabel , String comLabel ) { PhysicalEntityChain chain = getChain ( m , memLabel , comLabel ) ; return toStringSet ( chain . getModifications ( ) ) ; }
Gets modifications of the given elements in a string set. The elements has to be a
PhysicalEntity and they must be two ends of a chain with homology and/or complex membership
relations.
@param m match
@param memLabel the member-end of the PhysicalEntity chain
@param comLabel the complex-end of the PhysicalEntity chain
@return modifications