code: func (c *Connector) Read(ctx context.Context, ei *dosa.EntityInfo, values map[string]dosa.FieldValue, minimumFields []string) (map[string]dosa.FieldValue, error) {
  	if c.Next == nil {
  		return nil, NewErrNoMoreConnector()
  	}
  	return c.Next.Read(ctx, ei, values, minimumFields)
  }
docs: // Read calls Next