docs: private FieldConstraint makeSingleFieldConstraint(ConditionCol52 c,
                                                        String cell) {
  
          SingleFieldConstraint sfc = new SingleFieldConstraint(c.getFactField());
  
          //Condition columns can be defined as having no operator, in which case the operator
          //is taken from the cell's value. Pretty yucky really if we're to be able to perform
          //expansion and contraction of decision table columns.... this might have to go.
          if (no(c.getOperator())) {
  
              String[] a = cell.split("\\s");
              if (a.length > 1) {
                  //Operator might be 1 part (e.g. "==") or two parts (e.g. "not in")
                  StringBuilder operator = new StringBuilder(a[0]);
                  for (int i = 1; i < a.length - 1; i++) {
                      operator.append(a[i]);
                  }
                  sfc.setOperator(operator.toString());
                  sfc.setValue(a[a.length - 1]);
              } else {
                  sfc.setValue(cell);
              }
          } else {
  
              sfc.setOperator(c.getOperator());
              if (OperatorsOracle.operatorRequiresList(c.getOperator())) {
                  sfc.setValue(makeInList(cell));
              } else {
                  if (!c.getOperator().equals("== null") && !c.getOperator().equals("!= null")) {
                      sfc.setValue(cell);
                  }
              }
          }
          final int constraintValueType = c.getConstraintValueType();
          if ((constraintValueType == BaseSingleFieldConstraint.TYPE_LITERAL || constraintValueType == BaseSingleFieldConstraint.TYPE_RET_VALUE) && c.isBound()) {
              sfc.setFieldBinding(c.getBinding());
          }
          sfc.setParameters(c.getParameters());
          sfc.setConstraintValueType(c.getConstraintValueType());
          sfc.setFieldType(c.getFieldType());
          return sfc;
      }