code: public double get(int column, int row) {
          switch (column) {
          case 0:
              switch (row) {
              case 0:
                  return m00;
              case 1:
                  return m01;
              case 2:
                  return m02;
              default:
                  break;
              }
              break;
          case 1:
              switch (row) {
              case 0:
                  return m10;
              case 1:
                  return m11;
              case 2:
                  return m12;
              default:
                  break;
              }
              break;
          case 2:
              switch (row) {
              case 0:
                  return m20;
              case 1:
                  return m21;
              case 2:
                  return m22;
              default:
                  break;
              }
              break;
          default:
              break;
          }
          throw new IllegalArgumentException();
      }
docs: /*
  (non-Javadoc)
  @see org.joml.Matrix3dc#get(int, int)