# Package org.slf4j.helpers

Helper classes.

See: Description

- Class Summary
  Class | Description
  --- | ---
  BasicMarker | A simple implementation of the `Marker` interface.
  BasicMarkerFactory | An almost trivial implementation of the `IMarkerFactory` interface which creates `BasicMarker` instances.
  BasicMDCAdapter | Basic MDC implementation, which can be used with logging systems that lack out-of-the-box MDC support.
  FormattingTuple | Holds the results of formatting done by `MessageFormatter`.
  MarkerIgnoringBase | This class serves as base for adapters or native implementations of logging systems lacking Marker support.
  MessageFormatter | Formats messages according to very simple substitution rules.
  NOPLogger | A direct NOP (no operation) implementation of `Logger`.
  NOPLoggerFactory | NOPLoggerFactory is an trivial implementation of `ILoggerFactory` which always returns the unique instance of NOPLogger.
  NOPMDCAdapter | This adapter is an empty implementation of the `MDCAdapter` interface.
  SubstituteLogger | A logger implementation which logs via a delegate logger.
  SubstituteLoggerFactory | SubstituteLoggerFactory manages instances of `SubstituteLogger`.
  Util | An internal utility class.

## Package org.slf4j.helpers Description

Helper classes.

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