Specifies the language of the source files - typically {@code java} or {@code resources}.
            Resources is used as a generic term for scripting languages (e.g., JavaScript or Python)
            or markup languages (e.g. properties file, <abbr>JSON</abbr> or <abbr>XML</abbr>).

            <p>The <b>java</b> language is used for specifying a directory containing the Java sources of the project.

.addClass(CLASS_NAME_ACTIVE)\n      $link.addClass(CLASS_NAME_ACTIVE)\n    } else {\n      // Set triggered link as active\n      $link.addClass(CLASS_NAME_ACTIVE)\n      // Set triggered links parents as active\n      // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor\n      $link.parents(SELECTOR_NAV_LIST_GROUP)\n        .prev(`${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}`)\n        .addClass(CLASS_NAME_ACTIVE)\n      // Handle special case when .nav-link is...