code: private ConversionMethod verifyConversionExistence(List<ConversionMethod> conversions){
  		for (ConversionMethod method : conversions) 
  			if(isPresentIn(method.getFrom(),sourceName) && 
  			   isPresentIn(method.getTo()  ,destinationName))
  				return method;
  				
  		return null;
  	}
docs: This method finds the conversion method between those loaded.
  @param conversions conversion methods list
  @return the conversion method if found, null otherwise