liquibase-core/src/main/java/liquibase/util/StringClauses.java
public StringClauses replace(String key, String newValue) throws IllegalArgumentException {
        return replaceImpl(key, StringUtil.trimToEmpty(newValue));
    }
public StringClauses replace(String key, String newValue) throws IllegalArgumentException {
        return replaceImpl(key, StringUtil.trimToEmpty(newValue));
    }
Replaces the given key with a new string. If the existing key does not exist, throws IllegalArgumentException