code: public void insertIntoThis(int insertRow, int insertCol, T B) {
          convertType.specify(this,B);
          B = convertType.convert(B);
  
          // See if this type's need to be changed or not
          if( convertType.commonType == getType() ) {
              insert(B.mat,mat,insertRow,insertCol);
          } else {
              T A = convertType.convert(this);
              A.insert(B.mat,A.mat,insertRow,insertCol);
              setMatrix(A.mat);
          }
      }
docs: Copy matrix B into this matrix at location (insertRow, insertCol).
  
  @param insertRow First row the matrix is to be inserted into.
  @param insertCol First column the matrix is to be inserted into.
  @param B The matrix that is being inserted.