code: public void filterClasspathElements(final ClasspathElementFilter classpathElementFilter) {
          if (this.classpathElementFilters == null) {
              this.classpathElementFilters = new ArrayList<>(2);
          }
          this.classpathElementFilters.add(classpathElementFilter);
      }
docs: Add a classpath element filter. The provided ClasspathElementFilter should return true if the path string
  passed to it is a path you want to scan.
  
  @param classpathElementFilter
  The classpath element filter to apply to all discovered classpath elements, to decide which should
  be scanned.