NewBytesRefBuilder Sole constructor.

WithCapacity capacity 需要是2的平方，如 4\16\32等.

FIRST_LEVEL_SIZE The first level size for new slices See Also: NewSlice(int).

LEVEL_SIZE_ARRAY An array holding the level sizes for byte slices.

NEXT_LEVEL_ARRAY An array holding the offset into the LEVEL_SIZE_ARRAY to quickly navigate to the next slice level.

Array A simple append only random-access BytesRef array that stores full copies of the appended []byte in a BlockPool.

BlockPool that Posting and PostingVector use to write byte streams into shared fixed-size byte[] arrays.

Builder A builder for BytesRef instances.

BytesHash is a special purpose hash-map like data-structure optimized for BytesRef instances.

DirectStartArray A simple BytesHash.BytesStartArray that tracks memory allocation using a private Counter instance.

Allocator Abstract class for allocating and freeing byte blocks.

StartArray Manages allocation of the per-term addresses.