code: public InclusMultiPos<S, String, String> setBefore(String right) {
  		return new InclusMultiPos<S, String, String>(right, right) {
  			
  			@Override protected S result() {
  				return delegateQueue('B', left, right, pos, position, inclusive, plusminus, filltgt);
  			}
  		};
  	}
docs: Sets the specified position substring before given right tag as the delegate string
  <p><b>The look result same as {@link StrMatcher#finder()}'s behavior</b>
  
  @see StrMatcher#finder()
  @param left
  @param right
  @return