code: public boolean isUpdatableColumn(final String columnName)
     {
        // Use index iteration to avoid generating an Iterator as side-effect
        final FieldColumnInfo[] fcInfos = getUpdatableFcInfos();
        for (int i = 0; i < fcInfos.length; i++) {
           if (fcInfos[i].getCaseSensitiveColumnName().equals(columnName)) {
              return true;
           }
        }
        return false;
     }
docs: Is this specified column updatable?
  
  @param columnName Same case as in name element or property name without delimeters.
  @return true if updatable, false otherwise