question: the id of this mapping . concode_field_sep int mappingId concode_elem_sep ShardingType shardingType concode_elem_sep Set<ShardTable> shardTables concode_elem_sep Set<ShardIndex> shardIndices concode_elem_sep String globalGroupName concode_field_sep ShardIndex getShardIndexForKey concode_elem_sep ShardingType getShardingType concode_elem_sep Set<ShardIndex> getShardIndices concode_elem_sep String getGlobalGroupName concode_elem_sep Set<ShardTable> getShardTables concode_elem_sep String getGroupNameForKey
target: int function ( ) { return this . mappingId ; }