code: boolean isSameSchemaAndTable(IntColumnSpecWrapper columnSpec) {
          return StringUtil.equals(columnSpec.getSchema(), getSchema())
                  && StringUtil.equals(columnSpec.getTable(), getTable());
      }
docs: Returns whether the given column specification has the same schema and
  table as this one.
  
  @param columnSpec
  a {@link ColumnSpec}.
  @return <code>true</code> if the given column specification has the same
  schema and table as this one, <code>false</code> if not.