成员的完整列表，这些成员属于 com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor,包括所有继承而来的类成员

encrypt(final File originFile)	com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor
filterMsg(final ArrayList< IMMessage > messages)	com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor
progressUpdate(int progress, int state)	com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor
secretKey()	com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor
zip(final File originFile)	com.netease.nimlib.sdk.migration.processor.IMsgExportProcessor