lib/operations/collection_ops.js
function updateMany(coll, filter, update, options, callback) {
  // Set single document update
  options.multi = true;
  // Execute update
  updateDocuments(coll, filter, update, options, (err, r) => updateCallback(err, r, callback));
}
function updateMany(coll, filter, update, options, callback) {
  // Set single document update
  options.multi = true;
  // Execute update
  updateDocuments(coll, filter, update, options, (err, r) => updateCallback(err, r, callback));
}
function updateMany ( coll , filter , update , options , callback ) { // Set single document update options . multi = true ; // Execute update updateDocuments ( coll , filter , update , options , ( err , r ) => updateCallback ( err , r , callback ) ) ; }
Update multiple documents in the collection.

@method
@param {Collection} a Collection instance.
@param {object} filter The Filter used to select the documents to update
@param {object} update The update operations to be applied to the document
@param {object} [options] Optional settings. See Collection.prototype.updateMany for a list of options.
@param {Collection~updateWriteOpCallback} [callback] The command result callback
Update multiple documents in the collection .