- Represents an empty input. 
- Input passed to the - exec_commandhost function.
 
- Output returned from the - exec_commandhost function.
 
- Input passed to the - execute_extensionfunction.
 
- Input passed to the - register_extensionfunction.
 
- Output returned from the - register_extensionfunction.
 
- A file system locator. 
- A GitHub release locator. 
- Information about the host environment (the current runtime). 
- Input passed to the - host_loghost function.
 
- Information about the current moon workspace. 
- Input passed to the - send_requesthost function.
 
- Output returned from the - send_requesthost function.
 
- Input passed to the - sync_workspacefunction.
 
- Output returned from the - sync_workspacefunction.
 
- Information about the current testing environment. 
- Input passed to the - register_toolchainfunction.
 
- Output returned from the - register_toolchainfunction.
 
- A HTTPS URL locator.