code: function getConditionalStatement() {
    const type = NodeType.ConditionalStatementType;
    const token = tokens[pos];
    const line = token.ln;
    const column = token.col;
    const content = [].concat(
      getCondition(),
      getSC(),
      getBlock()
    );
  
    return newNode(type, content, line, column);
  }
docs: Get node with a condition.
  @return {Array} `['condition', x]`