method
    
    connected?
 
  connected?(spec_name, role: ActiveRecord::Base.current_role, shard: ActiveRecord::Base.current_shard)
  public
  Returns true if a connection that’s accessible to this class has already been opened.
 
  connected?(spec_name, role: ActiveRecord::Base.current_role, shard: ActiveRecord::Base.current_shard)
  public
  Returns true if a connection that’s accessible to this class has already been opened.