The function used by forEach method
function(filter, index, list) {
        // Shortcuts
        if (filter === 'combine') {
            list[index] = self.filters.combine;
            return;
        }

        // Solfege URI
        if (typeof filter === 'string' && self.application.isSolfegeUri(filter)) {
            list[index] = self.application.resolveSolfegeUri(filter, self);
        }
    }