code: public StorageDescriptor withColumns(Column... columns) {
          if (this.columns == null) {
              setColumns(new java.util.ArrayList<Column>(columns.length));
          }
          for (Column ele : columns) {
              this.columns.add(ele);
          }
          return this;
      }
docs: <p>
  A list of the <code>Columns</code> in the table.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setColumns(java.util.Collection)} or {@link #withColumns(java.util.Collection)} if you want to override
  the existing values.
  </p>
  
  @param columns
  A list of the <code>Columns</code> in the table.
  @return Returns a reference to this object so that method calls can be chained together.