public SchemaBuilder parameter(String propertyName, String propertyValue) {
        // Preserve order of insertion with a LinkedHashMap. This isn't strictly necessary, but is nice if logical types
        // can print their properties in a consistent order.
        if (parameters == null)
            parameters = new LinkedHashMap<>();
        parameters.put(propertyName, propertyValue);
        return this;
    }
Set a schema parameter.
@param propertyName name of the schema property to define
@param propertyValue value of the schema property to define, as a String
@return the SchemaBuilder
connect/api/src/main/java/org/apache/kafka/connect/data/SchemaBuilder.java