public int getItemCount();
public int getDataSize();
public Integer[] getUniqueIdentifierArray();
public Set<Integer> getUniqueIdentifierSet();
public Integer getOffset(Integer id, Integer type);
<BUG>public int getOffset(int index);
</BUG>
public Set<Integer> getTypes(Integer id);
public boolean containsKey(Integer key);
public String toString(FieldMap fieldMap);

public int getItemCount();
public int getDataSize();
public Integer[] getUniqueIdentifierArray();
public Set<Integer> getUniqueIdentifierSet();
public Integer getOffset(Integer id, Integer type);
public int[] getOffsets();
public Set<Integer> getTypes(Integer id);
public boolean containsKey(Integer key);
public String toString(FieldMap fieldMap);
