/**
 * A logging adapter that will be used through the bus library
 * in cases where it should use a provided logger rather than
 * the in-built one.
 */ export interface Logger { debug ( message , meta ? ) : void ; trace ( message , meta ? ) : void ; info ( message , meta ? ) : void ; warn ( message , meta ? ) : void ; error ( message , meta ? ) : void ; fatal ( message , meta ? ) : void ; }