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/// ProcessName is used to uniquely name a process from a Rust type.
///
/// It is implemented for common string types such as `&str` and `String`,
/// but can be implemented on a custom type to create a process name type.
///
/// It is best used with the [ProcessName](lunatic_macros::ProcessName) derive
/// macro to generate a unique name.
///
/// # Example
///
/// ```
/// #[derive(ProcessName)]
/// struct LoggingProcess;
///
/// let process = lunatic::spawn!(|| { /* ... */});
/// process.register(&LoggingProcess);
/// ```
///
/// Alternatively, you can implement the trait manually.
///
/// ```
/// struct LoggingProcess;
///
/// impl ProcessName for LoggingProcess {
/// fn process_name(&self) -> &str {
/// "global_logging_process"
/// }
/// }
/// ```
///
/// For more information, see the [derive macro](lunatic_macros::ProcessName)
/// docs.