code: public boolean isDescendent(TarEntry desc) {
          return desc.header.name.toString().startsWith(this.header.name.toString());
      }
docs: Determine if the given entry is a descendant of this entry. Descendancy is determined by the name of the
  descendant starting with this entry's name.
  
  @param desc
  Entry to be checked as a descendent of this.
  @return True if entry is a descendant of this.