public SortFilterEventInfoHashtable GetSortFilterEventInfo(ChunkManager.RenderingChunkManager chunkManager) { IntermediateFormatReader intermediateFormatReader = null; if (this.m_sortFilterEventInfo != null) { return((SortFilterEventInfoHashtable)this.m_sortFilterEventInfo); } intermediateFormatReader = chunkManager.GetSpecialChunkReader(ChunkManager.SpecialChunkName.SortFilterEventInfo); if (intermediateFormatReader != null) { return(intermediateFormatReader.ReadSortFilterEventInfoHashtable()); } return(null); }