CommandAPI  5.3
An API for the command UI introduced in Minecraft 1.13
Class List
Here are the classes, structs, unions and interfaces with brief descriptions:
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 CAmbiguityConsumerA consumer that is notified of found ambiguities in the command tree
 CCommandThe functional interface actually representing a command to execute
 CCommandDispatcherThe core command dispatcher, for registering, parsing, and executing commands
 CImmutableStringReaderA string reader can be used to progressively read through a string
 CLiteralMessageA Message that has a literal string it returns
 CMessageAn abstract notion of a message that can be displayed to a user
 CParseResultsConsolidates the results of parsing a command in an object
 CRedirectModifierA redirect modifier to apply when a command is redirected and/or forked
 CResultConsumerA consumer that is called by the CommandDispatcher whenever a command completed
 CSingleRedirectModifierBasically a RedirectModifier (though no subtype) that only converts to a single command source
 CStringReaderA mutable implementation of an ImmutableStringReader, that allows moving the cursor
 NannotationsAnnotations which can be used with the CommandAPI annotation system
 NargumentsClasses to be used as arguments for commands
 NexceptionsClasses which are the exceptions raised during the execution of the Command API
 NexecutorsClasses relating to the different FunctionalInterfaces for command execution
 NwrappersClasses that are wrappers for various vanilla-related command features
 CBrigadierThe Brigadier class is used to access some of the internals of the CommandAPI so you can use the CommandAPI alongside Mojang's com.mojang.brigadier package
 CCommandAPIClass to register commands with the 1.13 command UI
 CCommandAPICommandA builder used to create commands to be registered by the CommandAPI
 CCommandAPIHandlerHandles the main backend of the CommandAPI
 CCommandPermissionA representation of permission nodes for commands
 CConverter'Simple' conversion of Plugin commands
 CIStringTooltipA string-based tooltip interface that includes a string suggestion and a string tooltip text to display when hovering over the suggestion
 CStringTooltipRepresents a suggestion for an argument with a hover tooltip text for that suggestion
 CTooltipThis class represents a suggestion for an argument with a hover tooltip text for that suggestion