Attempts to write to File a seriailized version of the
AbstractGrid2DSquareCellChunk in this._ChunkID_AbstractGrid2DSquareCellChunk_HashMap given by;
chunk row index _ChunkRowIndex, chunk column index _ChunkColIndex.
Attempts to write to File a seriailized version of the
AbstractGrid2DSquareCellChunk in this._ChunkID_AbstractGrid2DSquareCellChunk_HashMap given by _ChunkID.
Attempts to write to File seriailized versions of those
AbstractGrid2DSquareCellChunk in this._ChunkID_AbstractGrid2DSquareCellChunk_HashMap that
have ChunkID equal to those in _ChunkIDs.