code: public boolean matchesSystemAndCode(BaseCodingDt theCoding) {
  		if (theCoding == null) {
  			return false;
  		}
  		return getCodeElement().equals(theCoding.getCodeElement()) && getSystemElement().equals(theCoding.getSystemElement());
  	}
docs: Returns true if <code>this</code> Coding has the same {@link #getCodeElement() Code} and {@link #getSystemElement() system} (as compared by simple equals comparison). Does not compare other
  Codes (e.g. getUseElement()) or any extensions.