filterDocs = function(docs) {
  return _.reject(docs, function(doc) {
    // Skip functions starting with 'exports' and ending with _.
    if (!doc.name || /^exports/.test(doc.name) || /_\s*$/.test(doc.name)) {
      return true;
    }

    // Exclude docs with tags.
    if (doc.tags) {
      var tags = _.pluck(doc.tags.tags, 'tagName');
      return _.intersection(tags, excludedTags).length;
    }
  });
}
Remove docs that should not be in the documentation. Reject type, private,
exported functions, and function ending with underscore.

@param {Array.<Object>} docs The jsdoc list.