MongoDB\Driver\Server::isPrimary
  Checks if this server is a primary member of a replica set
  
 
  Description
  
   final public bool MongoDB\Driver\Server::isPrimary()
  
  
 
  Parameters
  This function has no parameters.
  
 
  Return Values
  
   Returns true if this server is a primary member of a replica set, and
   false otherwise.
  
  
 
  Errors/Exceptions
  
   - Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
 
 
  See Also
  
   - MongoDB\Driver\Server::getInfo