docs: public static Info eye( final Variable A , ManagerTempVariables manager) {
          Info ret = new Info();
          final VariableMatrix output = manager.createMatrix();
          ret.output = output;
  
          if( A instanceof VariableMatrix ) {
              ret.op = new Operation("eye-m") {
                  @Override
                  public void process() {
                      DMatrixRMaj mA = ((VariableMatrix)A).matrix;
                      output.matrix.reshape(mA.numRows,mA.numCols);
                      CommonOps_DDRM.setIdentity(output.matrix);
                  }
              };
          } else if( A instanceof VariableInteger ) {
              ret.op = new Operation("eye-i") {
                  @Override
                  public void process() {
                      int N = ((VariableInteger)A).value;
                      output.matrix.reshape(N,N);
                      CommonOps_DDRM.setIdentity(output.matrix);
                  }
              };
          } else {
              throw new RuntimeException("Unsupported variable type "+A);
          }
  
          return ret;
      }