code: public final T base(String field, Object value) {
          return value == null ? null : doBase(field, value);
      }
docs: Returns the {@link Column} query value resulting from the mapping of the specified object.
  
  @param field the field name
  @param value the object to be mapped, never is {@code null}
  @return the {@link Column} index value resulting from the mapping of the specified object