public void addField(final String key, final Object value) {
        fields.put(key, value);
    }

    public String getLogMessage() {
        return getUrl();
    }

    public LocalDateTime getRequestedAt() {
        return getCreatedAt();
    }

    @Override
    public Map<String, Object> toSource() {
        final Map<String, Object> sourceMap = super.toSource();
        if (fields != null) {

    }

    public void setVersionNo(final Long version) {
        asDocMeta().version(version);
    }

    public String getLogMessage() {
        return getId();
    }

    public LocalDateTime getRequestedAt() {
        return getUpdatedAt();
    }

    public void addField(final String key, final Object value) {
        fields.put(key, value);
    }

    @Override
    public Map<String, Object> toSource() {

    }

    public void setQueryRequestedAt(LocalDateTime value) {
        registerModifiedProperty("queryRequestedAt");
        this.queryRequestedAt = value;
    }

    public LocalDateTime getRequestedAt() {
        checkSpecifiedProperty("requestedAt");
        return requestedAt;
    }

    public void setRequestedAt(LocalDateTime value) {
        registerModifiedProperty("requestedAt");