# API glossary Source: https://libtmux.org/en/raku/latest/reference/glossary/ > Kinds, modifiers and package labels in the Raku API reference. ## Symbol kinds Kinds identify declarations in the Raku API reference. ### module A Raku compilation unit that declares packages and exports declarations with is export. The module badge names a namespace. LibTmux re-exports the public declarations of its modules, so use LibTmux gives programs the common names. A distribution and a module are different identities. References: [Raku modules](https://docs.raku.org/language/modules). ### class A Raku class: a package that creates objects with its own attributes and methods. A captured model class reads local state. A reference class such as PaneRef names a tmux object and sends commands on request. References: [Raku type system](https://docs.raku.org/language/typesystem). ### enum A Raku enumeration: a set of named constants of one type. Members compare by identity and keep their declared order. References: [Raku type system](https://docs.raku.org/language/typesystem). ### trait A Raku trait modifies a declaration with is, does or of. A trait changes how the declaration behaves; it is not a Rust or Java trait. References: [Raku traits](https://docs.raku.org/language/traits). ### function A Raku sub: a routine called by name with no invocant. A function with a hyphenated name is called as written, such as decode-layout. References: [Raku functions](https://docs.raku.org/language/functions). ### method A Raku method invoked on an object or a type object with a dot. The invocant is implicit. A method that talks to tmux says so in its summary; one that reads a captured snapshot does not. A name ending in -async returns a Promise. References: [Raku objects](https://docs.raku.org/language/objects). ### property A public attribute accessor or a method declared as a field of a captured record. Reading it returns the value the snapshot captured and performs no I/O. References: [Raku objects](https://docs.raku.org/language/objects). ### constant A named Raku value or enumeration member that cannot be reassigned. An enumeration member is also listed under its enum. References: [Raku variables](https://docs.raku.org/language/variables). ### typealias A Raku subset or type constraint that gives a checked name to a narrower type. The constraint runs when a value is bound. It does not create a new class. References: [Raku type system](https://docs.raku.org/language/typesystem). ### exception A Raku exception class that callers throw, catch with CATCH or try, and inspect by type. LibTmux exceptions live under X::LibTmux and carry the fields the failure produced. References: [Raku exceptions](https://docs.raku.org/language/exceptions). ## Modifiers Modifiers add information about calling, implementing, or accessing a declaration. Their precise effect follows the language and the signature. ### async An operation that returns a Promise and completes on the Raku scheduler. Await the Promise or consume it with react and whenever. Completion of the Promise and release of its resources are separate; close what the operation owns. References: [Raku concurrency](https://docs.raku.org/language/concurrency). ### overload One of several multi declarations that share a name and differ in their signatures. Raku selects the candidate from the argument types at the call. Read each signature for the types it accepts. References: [Raku functions](https://docs.raku.org/language/functions). ### inherited A method found through Raku class inheritance. The page names the declaring class. A subclass reuses the method and its documented behavior unchanged. References: [Raku type system](https://docs.raku.org/language/typesystem). ## Package context Package labels identify where an API is supplied. ### package The installable Raku distribution supplying this API, identified by name and authority. The distribution LibTmux:auth provides these modules. References: [Raku modules](https://docs.raku.org/language/modules).