liquibase-core/src/main/java/liquibase/util/csv/opencsv/bean/HeaderColumnNameMappingStrategy.java
@Override
   public BeanField findField(int col) {
      String columnName = getColumnName(col);
      return (StringUtil.trimToNull(columnName) != null) ? findField(columnName) : null;
   }
@Override
   public BeanField findField(int col) {
      String columnName = getColumnName(col);
      return (StringUtil.trimToNull(columnName) != null) ? findField(columnName) : null;
   }
Gets the field for a given column position.

@param col the column to find the field for
@return - BeanField containing the field - and whether it is mandatory - for a given column position, or null if
one could not be found