public int getKeyFieldIndex(Field[] fields) {
        String keyField = getKeyFieldName();
        return Field.getFieldIndex(fields, keyField);
    }
public int getKeyFieldIndex ( Field [ ] fields ) { String keyField = getKeyFieldName ( ) ; return Field . getFieldIndex ( fields , keyField ) ; }
Returns the index of the key field within the array of fields provided for a given table.
@param fields array of fields (intended to be derived from the headers of a csv text file)