jodd-bean/src/main/java/jodd/bean/BeanUtilBean.java
@Override
	public String extractThisReference(final String propertyName) {
		int ndx = StringUtil.indexOfChars(propertyName, INDEX_CHARS);
		if (ndx == -1) {
			return propertyName;
		}
		return propertyName.substring(0, ndx);
	}
@Override
	public String extractThisReference(final String propertyName) {
		int ndx = StringUtil.indexOfChars(propertyName, INDEX_CHARS);
		if (ndx == -1) {
			return propertyName;
		}
		return propertyName.substring(0, ndx);
	}
Extract the first name of this reference.