// Set all cells to -1.  -1 means that the cell is empty (not set yet).
 //
 // JAVAPORT: We shouldn't need to do this at all. The code should be rewritten to begin encoding
 // with the ByteMatrix initialized all to zero.
 public static void clearMatrix(ByteMatrix matrix)
 {
     matrix.clear((sbyte) (- 1));
 }
 // Set all cells to -1.  -1 means that the cell is empty (not set yet).
 //
 // JAVAPORT: We shouldn't need to do this at all. The code should be rewritten to begin encoding
 // with the ByteMatrix initialized all to zero.
 public static void  clearMatrix(ByteMatrix matrix)
 {
     matrix.clear((sbyte)(-1));
 }