| Package | Description | 
|---|---|
| com.hazelcast.internal.plugin.multicast | Contains the hazelcast multicast plugin classes | 
| com.hazelcast.spi.discovery | This package contains the public SPI for vendors and users to implement their
 custom node / IP discovery strategy. | 
| com.hazelcast.spi.partitiongroup | This package contains the basic SPI for the Partition Group SPI to define
 or configure how Hazelcast will configure and distribute backups in the
 cluster. | 
| Class and Description | 
|---|
| PartitionGroupStrategy A PartitionGroupStrategy implementation defines a strategy
 how backup groups are designed. | 
| Class and Description | 
|---|
| PartitionGroupStrategy A PartitionGroupStrategy implementation defines a strategy
 how backup groups are designed. | 
| Class and Description | 
|---|
| PartitionGroupMetaData This class contains the definition of known Discovery SPI metadata to support automatic
 generation of zone aware backup strategies based on cloud or service discovery provided
 information. | 
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