code: public static RowSchema fromColumns(List<AccumuloColumnHandle> columns)
      {
          RowSchema schema = new RowSchema();
          for (AccumuloColumnHandle columnHandle : columns) {
              schema.addColumn(
                      columnHandle.getName(),
                      columnHandle.getFamily(),
                      columnHandle.getQualifier(),
                      columnHandle.getType(),
                      columnHandle.isIndexed());
          }
          return schema;
      }
docs: Creates a new {@link RowSchema} from a list of {@link AccumuloColumnHandle} objects. Does not validate the schema.
  
  @param columns Column handles
  @return Row schema