cdm/src/main/java/ucar/ma2/StructureDataDeep.java
static public StructureDataDeep copy(StructureData sdata, StructureMembers members) {
    ArrayStructureBB abb = copyToArrayBB(sdata, members, ByteOrder.BIG_ENDIAN);
    return new StructureDataDeep(abb);
  }
static public StructureDataDeep copy(StructureData sdata, StructureMembers members) {
    ArrayStructureBB abb = copyToArrayBB(sdata, members, ByteOrder.BIG_ENDIAN);
    return new StructureDataDeep(abb);
  }
Make deep copy from sdata to another StructureData object whose data is self contained
@param sdata    original sdata
@param members  the StructureData members. a reference is kept to this object
@return StructureData with all data self contained