code: public void setColumns(java.util.Collection<Column> columns) {
          if (columns == null) {
              this.columns = null;
              return;
          }
  
          this.columns = new java.util.ArrayList<Column>(columns);
      }
docs: <p>
  A list of the <code>Columns</code> in the table.
  </p>
  
  @param columns
  A list of the <code>Columns</code> in the table.