CheckServerFlag checks that server is configured by default or passed as a flag.

ComposeArgsCheck gets multiple checker functions and composes a new check.

NewCmdFactory returns a new Factory object used during commands execution.

System returns an IOStreams object with prepared input/output.

Factory contains all data needed during commands execution.

IOStreams contains information for input/output used in the CLI.

CmdFactory interface to define all methods needed during commands creation.