liquibase-core/src/main/java/liquibase/snapshot/jvm/UniqueConstraintSnapshotGenerator.java
private void setValidateOptionIfAvailable(Database database, UniqueConstraint uniqueConstraint, Map<String, ?> columnsMetadata) {
        if (!(database instanceof OracleDatabase)) {
            return;
        }
        final Object constraintValidate = columnsMetadata.get("CONSTRAINT_VALIDATE");
        final String VALIDATE = "VALIDATED";
        if (constraintValidate!=null && !constraintValidate.toString().trim().isEmpty()) {
            uniqueConstraint.setShouldValidate(VALIDATE.equals(cleanNameFromDatabase(constraintValidate.toString().trim(), database)));
        }
    }
private void setValidateOptionIfAvailable(Database database, UniqueConstraint uniqueConstraint, Map<String, ?> columnsMetadata) {
        if (!(database instanceof OracleDatabase)) {
            return;
        }
        final Object constraintValidate = columnsMetadata.get("CONSTRAINT_VALIDATE");
        final String VALIDATE = "VALIDATED";
        if (constraintValidate!=null && !constraintValidate.toString().trim().isEmpty()) {
            uniqueConstraint.setShouldValidate(VALIDATE.equals(cleanNameFromDatabase(constraintValidate.toString().trim(), database)));
        }
    }
Method to map 'validate' option for UC. This thing works only for ORACLE

@param database - DB where UC will be created
@param uniqueConstraint - UC object to persist validate option
@param columnsMetadata - it's a cache-map to get metadata about UC