@Override
        public Map<String, T> map(ResultSet rs, StatementContext ctx) throws SQLException {
            return specialize(rs, ctx).map(rs, ctx);
        }
Returns a {@link RowMapper} for a map with the given value type. The key type is {@link String}.

@param valueType A {@link Class} instance representing the value type for the {@link Map}
@param config    A {@link ConfigRegistry} instance
@param <T>       The value type
@return A {@link RowMapper} for a map from string to the given value type
core/src/main/java/org/jdbi/v3/core/mapper/GenericMapMapperFactory.java