applyFilter method
Apply a filter to firstPerson and secondPerson.
This is used by SocialsFactory.getStrings to change the case of the output.
You can also use filters in your social strings, by placing a vertical bar (|) between your social formatter, and the name of the filter.
For example:
%1homepage|url
Implementation
void applyFilter(FilterType filter) {
firstPerson = filter(firstPerson);
secondPerson = filter(secondPerson);
}