code: function getIdent() {
    const type = NodeType.IdentType;
    const token = tokens[pos];
    const line = token.ln;
    const column = token.col;
    const content = joinValues(pos, tokens[pos].ident_last);
  
    pos = tokens[pos].ident_last + 1;
  
    return newNode(type, content, line, column);
  }
docs: Get node with an identifier
  @return {Array} `['ident', x]` where `x` is identifier's name