on
Provides tab completion suggestions for the /core command.
This method implements intelligent tab completion to improve user experience when typing commands. It provides context-aware suggestions based on the current input and supports partial matching for efficient command entry.
Completion Logic:
For first argument: Suggests available subcommands that match the current input
For additional arguments: Returns empty list (no further completion needed)
Uses case-insensitive partial matching for flexible input
Automatically sorts suggestions alphabetically for consistent ordering
Available Completions:
info- Complete subcommand name for information displayreload- Complete subcommand name for configuration reloadtestplugin- Complete subcommand name for system diagnostics
Features:
Partial string matching using StringUtil.copyPartialMatches
Automatic sorting of completion results
Case-insensitive input handling
Efficient early return for unsupported argument positions
Return
List of completion suggestions, or null if no completions are available - For first argument: List of matching subcommands - For other positions: Empty list
Parameters
The CommandSender requesting tab completion
The Command being completed
The command alias being used (if any)
Array of current command arguments being completed