OpenImmo/src/main/java/org/openestate/io/openimmo/converters/OpenImmo_1_2_7.java
@Override
    public void downgradeToPreviousVersion(OpenImmoDocument doc) {
        doc.setDocumentVersion(OpenImmoVersion.V1_2_6);

        if (doc instanceof OpenImmoTransferDocument) {
            try {
                this.removeMultipleEnergiepassElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't remove odd <energiepass> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.removeObjektTextElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't remove unsupported <objekt_text> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeSummemietenettoElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <summemietenetto> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeBefeuerungElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <befeuerung> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeAnhangElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <anhang> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeAktionElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <aktion> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeEnergiepassElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <energiepass> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }
        }
    }
@Override
    public void downgradeToPreviousVersion(OpenImmoDocument doc) {
        doc.setDocumentVersion(OpenImmoVersion.V1_2_6);

        if (doc instanceof OpenImmoTransferDocument) {
            try {
                this.removeMultipleEnergiepassElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't remove odd <energiepass> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.removeObjektTextElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't remove unsupported <objekt_text> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeSummemietenettoElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <summemietenetto> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeBefeuerungElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <befeuerung> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeAnhangElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <anhang> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeAktionElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <aktion> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }

            try {
                this.downgradeEnergiepassElements(doc.getDocument());
            } catch (Exception ex) {
                LOGGER.error("Can't downgrade <energiepass> elements!");
                LOGGER.error("> " + ex.getLocalizedMessage(), ex);
            }
        }
    }
Downgrade an OpenImmo document from version 1.2.7 to 1.2.6.

@param doc OpenImmo document in version 1.2.7