code: function srcToMarkdown(src, level, threshold) {
    var blocks = srcToBlocks(src);
  
    return blocksToMarkdown(blocks, level, threshold);
  }
docs: Generate Markdown from doc-commented source
  
  Visibility threshold can be:
  
  0: public only
  1: public and protected
  2: public, protected and private
  
  @param {String} src       Source code
  @param {Number} level     Header starting level (1-6)
  @param {Number} threshold Visibility threshold
  
  @return {String} Markdown text