public Builder appendNamedParameter(String name) {
            named = true;
            parameterNames.add(name);
            return append(POSITIONAL_PARAM);
        }
Records a named parameter with the given name, and appends a
<code>?</code> to the SQL string.

@param name the parameter name.
@return this
core/src/main/java/org/jdbi/v3/core/statement/ParsedSql.java