## Uses of Interface
org.apache.log4j.spi.AppenderAttachable

Packages that use AppenderAttachable
org.apache.log4j: The main log4j package.
org.apache.log4j.helpers: This package is used internally.
org.apache.log4j.spi: Contains part of the System Programming Interface (SPI) needed to extend log4j.

Uses of AppenderAttachable in org.apache.log4j

Classes in org.apache.log4j that implement AppenderAttachable
`class` `AsyncAppender` The AsyncAppender lets users log events asynchronously.
`class` `Category` This class has been deprecated and replaced by the `Logger` subclass.
`class` `Logger` This is the central class in the log4j package.

Uses of AppenderAttachable in org.apache.log4j.helpers

Classes in org.apache.log4j.helpers that implement AppenderAttachable
`class` `AppenderAttachableImpl` A straightforward implementation of the `AppenderAttachable` interface.

Uses of AppenderAttachable in org.apache.log4j.spi

Classes in org.apache.log4j.spi that implement AppenderAttachable
`class` `NOPLogger` No-operation implementation of Logger used by NOPLoggerRepository.
`class` `RootCategory` Deprecated. Replaced by `RootLogger`.
`class` `RootLogger` RootLogger sits at the top of the logger hierachy.

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