set the file postion to the first datagroup . method should be protected . it is set when the object is being read . concode_field_sep byte magic concode_elem_sep byte MAGIC_NUM concode_elem_sep GenericDataHeader genericHdr concode_elem_sep String filename concode_elem_sep byte VERSION concode_elem_sep UInt firstDataGroupFilePos concode_elem_sep byte version concode_elem_sep List<DataGroupHeader> dataGroupHdrs concode_elem_sep UInt numDataGroups concode_field_sep byte getVersion concode_elem_sep GenericDataHeader getGenericDataHdr concode_elem_sep void clear concode_elem_sep void addDataGroupHdr concode_elem_sep void setNumDataGroups concode_elem_sep DataGroupHeader getDataGroup concode_elem_sep void setFilename concode_elem_sep String getFilename concode_elem_sep void setGenericDataHdr concode_elem_sep byte getMagicNumber concode_elem_sep DataGroupHeader findDataGroupHeader concode_elem_sep int getDataGroupCnt concode_elem_sep UInt getNumDataGroups concode_elem_sep UInt getFirstDataGroupFilePos
void function ( UInt arg0 ) { firstDataGroupFilePos = arg0 ; }