liquibase-core/src/main/java/liquibase/util/StringClauses.java
public StringClauses prepend(String key, String clause) {
        return prependImpl(key, StringUtil.trimToEmpty(clause));
    }
public StringClauses prepend(String key, String clause) {
        return prependImpl(key, StringUtil.trimToEmpty(clause));
    }
Adds a clause with the given key to the beginning of the list.