public void add(ExtendedCell cell, boolean mslabUsed, MemStoreSizing memStoreSizing,
    boolean sizeAddedPreOperation) {
    internalAdd(cell, mslabUsed, memStoreSizing, sizeAddedPreOperation);
  }
Adds the given cell into the segment
@param cell      the cell to add
@param mslabUsed whether using MSLAB
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableSegment.java