getCommandResult
Retrieves a previously stored command result by its key.
Return
The stored result cast to type R, or null if no result exists for the key
Parameters
R
The expected type of the result value
key
The unique identifier for the command result to retrieve
Throws
if the stored value cannot be cast to type R
if the key is null or empty
Retrieves all stored command results as a read-only map.
Return
An immutable map containing all command result key-value pairs. Returns an empty map if no results are stored.