[ntuple] Move PrepareBlobKey after private methods

Author: hahnjo

tree/ntuple/v7/inc/ROOT/RMiniFile.hxx

@@ -112,10 +112,6 @@ public:
    /// The key length of a blob. It is always a big key (version > 1000) with class name RBlob.
    static constexpr std::size_t kBlobKeyLen = 42;
 
-   /// Prepares buffer for a new record as an RBlob key at offset.
-   /// (Note that the array type is purely documentation, the argument is actually just a pointer.)
-   static void PrepareBlobKey(std::int64_t offset, size_t nbytes, size_t len, unsigned char buffer[kBlobKeyLen]);
-
 private:
    struct RFileProper {
       /// A sub directory in fFile or nullptr if the data is stored in the root directory of the file
@@ -246,6 +242,11 @@ public:
    std::uint64_t WriteNTupleFooter(const void *data, size_t nbytes, size_t lenFooter);
    /// Writes a new record as an RBlob key into the file
    std::uint64_t WriteBlob(const void *data, size_t nbytes, size_t len);
+
+   /// Prepares buffer for a new record as an RBlob key at offset.
+   /// (Note that the array type is purely documentation, the argument is actually just a pointer.)
+   static void PrepareBlobKey(std::int64_t offset, size_t nbytes, size_t len, unsigned char buffer[kBlobKeyLen]);
+
    /// Reserves a new record as an RBlob key in the file. If keyBuffer is specified, it must be written *before* the
    /// returned offset. (Note that the array type is purely documentation, the argument is actually just a pointer.)
    std::uint64_t ReserveBlob(size_t nbytes, size_t len, unsigned char keyBuffer[kBlobKeyLen] = nullptr);