isUndefOrNonZero = function (val) {
    return val === undefined || val !== '0';
  }
/*.css'
      ],
      docs: {
        options: {
          ids: false,
          'overqualified-elements': false
        },
        src: 'docs/assets/css/_src/docs.css'
      }
    },

    cssmin: {
      options: {
        compatibility: 'ie8',
        keepSpecialComments: '*',
        noAdvanced: true
      },
      core: {
        files: {
          'dist/css/<%= pkg.name %>.min.css': 'dist/css/<%= pkg.name %>.css',
          'dist/css/<%= pkg.name %>-theme.min.css': 'dist/css/<%= pkg.name %>-theme.css'
        }
      },
      docs: {
        src: [
          'docs/assets/css/_src/docs.css',
          'docs/assets/css/_src/pygments-manni.css'
        ],
        dest: 'docs/assets/css/docs.min.css'
      }
    },

    usebanner: {
      options: {
        position: 'top',
        banner: '<%= banner %>'
      },
      files: {
        src: 'dist/css/*.css'
      }
    },

    csscomb: {
      options: {
        config: 'less/.csscomb.json'
      },
      dist: {
        expand: true,
        cwd: 'dist/css/',
        src: ['*.css', '!*.min.css'],
        dest: 'dist/css/'
      },
      examples: {
        expand: true,
        cwd: 'docs/examples/',
        src: '*