@Override
    public String toString() {
        return "HasHeaderKey{" +
                "name='" + name + '\'' +
                '}';
    }
A predicate which is true for records with at least one header with the configured name.
@param <R> The type of connect record.
connect/transforms/src/main/java/org/apache/kafka/connect/transforms/predicates/HasHeaderKey.java