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#pragma once
#include <list>
namespace DB
{
class FileCache;
using FileCachePtr = std::shared_ptr<FileCache>;
class IFileCachePriority;
using FileCachePriorityPtr = std::unique_ptr<IFileCachePriority>;
class FileSegment;
using FileSegmentPtr = std::shared_ptr<FileSegment>;
using FileSegments = std::list<FileSegmentPtr>;
struct FileSegmentMetadata;
using FileSegmentMetadataPtr = std::shared_ptr<FileSegmentMetadata>;
struct LockedKey;
using LockedKeyPtr = std::shared_ptr<LockedKey>;
struct KeyMetadata;
using KeyMetadataPtr = std::shared_ptr<KeyMetadata>;
}
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