public final Filter<S> or(String expression) {
        return or(new FilterParser<S>(mType, expression).parseRoot());
    }
public final Filter < S > or ( String expression ) { return or ( new FilterParser < S > ( mType , expression ) . parseRoot ( ) ) ; }
Returns a combined filter instance that accepts records which are
accepted either by this filter or the one given.

@param expression query filter expression to parse
@return canonical Filter instance
@throws IllegalArgumentException if filter is null