code: function getInclude() {
    const type = tokens[pos].include_type;
  
    if (type === 1) return getInclude1();
    if (type === 2) return getInclude2();
    if (type === 3) return getInclude3();
    if (type === 4) return getInclude4();
    if (type === 5) return getInclude5();
  }
docs: Get node with included mixin
  @returns {Array} `['include', x]`