How to use the mongodb-core.MongoError.create function in mongodb-core

GridStoreStream.prototype.write = function(chunk, encoding, callback) {
  var self = this;
  if(self.endCalled) return self.emit('error', MongoError.create({message: 'attempting to write to stream after end called', driver:true}))
  // Do we have to open the gridstore
  if(!self.gs.isOpen) {
    self.gs.open(function() {
      self.gs.isOpen = true;
      self.gs.write(chunk, function() {
        process.nextTick(function() {
          self.emit('drain');
        });
      });
    });
    return false;
  } else {
    self.gs.write(chunk, function() {
      self.emit('drain');
    });
    return true;

Collection.prototype.insertMany = function(docs, options, callback) {
  var self = this;
  if(typeof options == 'function') callback = options, options = {};
  options = options || {ordered:true};
  if(!Array.isArray(docs) && typeof callback == 'function') {
    return callback(MongoError.create({message: 'docs parameter must be an array of documents', driver:true }));
  } else if(!Array.isArray(docs)) {
    return new this.s.promiseLibrary(function(resolve, reject) {
      reject(MongoError.create({message: 'docs parameter must be an array of documents', driver:true }));
    });
  }

  // Get the write concern options
  if(typeof options.checkKeys != 'boolean') {
    options.checkKeys = true;
  }

  // If keep going set unordered
  options['serializeFunctions'] = options['serializeFunctions'] || self.s.serializeFunctions;

  // Set up the force server object id
  var forceServerObjectId = typeof options.forceServerObjectId == 'boolean'

finalOptions = _setWriteConcernHash(options);
  } else if(options.safe != null && typeof options.safe == 'object') {
    finalOptions = _setWriteConcernHash(options.safe);
  } else if(typeof options.safe == "boolean") {
    finalOptions = {w: (options.safe ? 1 : 0)};
  } else if(self.options.w != null || typeof self.options.j == 'boolean' || typeof self.options.journal == 'boolean' || typeof self.options.fsync == 'boolean') {
    finalOptions = _setWriteConcernHash(self.options);
  } else if(self.safe && (self.safe.w != null || typeof self.safe.j == 'boolean' || typeof self.safe.journal == 'boolean' || typeof self.safe.fsync == 'boolean')) {
    finalOptions = _setWriteConcernHash(self.safe);
  } else if(typeof self.safe == "boolean") {
    finalOptions = {w: (self.safe ? 1 : 0)};
  }

  // Ensure we don't have an invalid combination of write concerns
  if(finalOptions.w < 1
    && (finalOptions.journal == true || finalOptions.j == true || finalOptions.fsync == true)) throw MongoError.create({message: "No acknowledgement using w < 1 cannot be combined with journal:true or fsync:true", driver:true});

  // Return the options
  return finalOptions;
}

var nextObject = function(self, callback) {
  if(self.s.state == Cursor.CLOSED || self.isDead && self.isDead()) return handleCallback(callback, MongoError.create({message: "Cursor is closed", driver:true}));
  if(self.s.state == Cursor.INIT && self.s.cmd.sort) {
    try {
      self.s.cmd.sort = formattedOrderClause(self.s.cmd.sort);
    } catch(err) {
      return handleCallback(callback, err);
    }
  }

  // Get the next object
  self._next(function(err, doc) {
    self.s.state = Cursor.OPEN;
    if(err) return handleCallback(callback, err);
    handleCallback(callback, null, doc);
  });
}

self.contentType = doc.contentType;
        self.internalChunkSize = doc.chunkSize;
        self.uploadDate = doc.uploadDate;
        self.aliases = doc.aliases;
        self.length = doc.length;
        self.metadata = doc.metadata;
        self.internalMd5 = doc.md5;
      } else if (self.mode != 'r') {
        self.fileId = self.fileId == null ? new ObjectID() : self.fileId;
        self.contentType = GridStore.DEFAULT_CONTENT_TYPE;
        self.internalChunkSize = self.internalChunkSize == null ? Chunk.DEFAULT_CHUNK_SIZE : self.internalChunkSize;
        self.length = 0;
      } else {
         self.length = 0;
         var txtId = self.fileId instanceof ObjectID ? self.fileId.toHexString() : self.fileId;
         return error(MongoError.create({message: f("file with id %s not opened for writing", (self.referenceBy == REFERENCE_BY_ID ? txtId : self.filename)), driver:true}), self);
      }

      // Process the mode of the object
      if(self.mode == "r") {
        nthChunk(self, 0, options, function(err, chunk) {
          if(err) return error(err);
          self.currentChunk = chunk;
          self.position = 0;
          callback(null, self);
        });
      } else if(self.mode == "w") {
        // Delete any existing chunks
        deleteChunks(self, options, function(err, result) {
          if(err) return error(err);
          self.currentChunk = new Chunk(self, {'n':0}, self.writeConcern);
          self.contentType = self.options['content_type'] == null ? self.contentType : self.options['content_type'];

var seek = function(self, position, seekLocation, callback) {
  // Seek only supports read mode
  if(self.mode != 'r') {
    return callback(MongoError.create({message: "seek is only supported for mode r", driver:true}))
  }

  var seekLocationFinal = seekLocation == null ? GridStore.IO_SEEK_SET : seekLocation;
  var finalPosition = position;
  var targetPosition = 0;

  // Calculate the position
  if(seekLocationFinal == GridStore.IO_SEEK_CUR) {
    targetPosition = self.position + finalPosition;
  } else if(seekLocationFinal == GridStore.IO_SEEK_END) {
    targetPosition = self.length + finalPosition;
  } else {
    targetPosition = finalPosition;
  }

  // Get the chunk

self.s.topology.insert(f("%s.%s", self.s.databaseName, Db.SYSTEM_INDEX_COLLECTION), doc, finalOptions, function(err, result) {
      if(callback == null) return;
      if(err) return handleCallback(callback, err);
      if(result == null) return handleCallback(callback, null, null);
      if(result.result.writeErrors) return handleCallback(callback, MongoError.create(result.result.writeErrors[0]), null);
      handleCallback(callback, null, doc.name);
    });
  });

self.s.db.listCollections({name: self.s.name}).toArray(function(err, collections) {
    if(err) return handleCallback(callback, err);
    if(collections.length == 0) {
      return handleCallback(callback, MongoError.create({message: f("collection %s not found", self.s.namespace), driver:true }));
    }

    handleCallback(callback, err, collections[0].options || null);
  });
}

CommandCursor.prototype.batchSize = function(value) {
  if(this.s.state == CommandCursor.CLOSED || this.isDead()) throw MongoError.create({message: "Cursor is closed", driver:true});
  if(typeof value != 'number') throw MongoError.create({message: "batchSize requires an integer", driver:true});
  if(this.s.cmd.cursor) this.s.cmd.cursor.batchSize = value;
  this.setCursorBatchSize(value);
  return this;
}