code: public boolean fieldsToCheck(Field destination, Field source){
  		destinationName = destination.getName();
  		sourceName = source.getName();
  		if(!xml.conversionsLoad().isEmpty()){
  			configurationType = XML;
  			if(config == DESTINATION){
  				if(existsXmlConversion(destinationClass)) { membership = Membership.DESTINATION;  return true;}
  				if(existsXmlConversion(sourceClass))      { membership = Membership.SOURCE;       return true;}}
  			else{
  				if(existsXmlConversion(sourceClass))      { membership = Membership.SOURCE;       return true;}
  				if(existsXmlConversion(destinationClass)) { membership = Membership.DESTINATION;  return true;}}
  		}
  		configurationType = ANNOTATION;
  		if(config == DESTINATION){
  			if(existsAnnotatedConversion(destinationClass)) { membership = Membership.DESTINATION;  return true;}
  			if(existsAnnotatedConversion(sourceClass))      { membership = Membership.SOURCE;       return true;}}
  		else{
  			if(existsAnnotatedConversion(sourceClass))      { membership = Membership.SOURCE;       return true;}
  			if(existsAnnotatedConversion(destinationClass)) { membership = Membership.DESTINATION;  return true;}}
  		return false;
  	}
docs: Checks for the existence of a conversion method.
  @param destination destination field
  @param source source field
  @return true if the conversion method exists, false otherwise