Packages 
Package Description
org.eclipse.aether.impl
The provisional interfaces defining the various subcomponents that implement the repository system.
org.eclipse.aether.impl.scope  
org.eclipse.aether.internal.impl
The various sub components that collectively implement the repository system.
org.eclipse.aether.internal.impl.checksum  
org.eclipse.aether.internal.impl.collect
Internal helper classes for dependency collector.
org.eclipse.aether.internal.impl.collect.bf  
org.eclipse.aether.internal.impl.collect.df  
org.eclipse.aether.internal.impl.filter  
org.eclipse.aether.internal.impl.filter.prefixes  
org.eclipse.aether.internal.impl.filter.ruletree  
org.eclipse.aether.internal.impl.named  
org.eclipse.aether.internal.impl.offline  
org.eclipse.aether.internal.impl.resolution  
org.eclipse.aether.internal.impl.scope  
org.eclipse.aether.internal.impl.session  
org.eclipse.aether.internal.impl.synccontext  
org.eclipse.aether.internal.impl.synccontext.named  
org.eclipse.aether.internal.impl.synccontext.named.providers
As end-user "mappers" are actually configurations, constructed from several NameMapper implementations, this package have providers exposing name mappers constructed by NameMappers helper class.
org.eclipse.aether.internal.impl.transport.http