liquibase-core/src/main/java/liquibase/util/StringClauses.java
public StringClauses insertAfter(String existingKey, String newKey, String newValue) {
        return insertAfterImpl(existingKey, newKey, newValue);
    }
public StringClauses insertAfter(String existingKey, String newKey, String newValue) {
        return insertAfterImpl(existingKey, newKey, newValue);
    }
Inserts a new clause after the given key. Throws IllegalArgumentException if the existingKey does not exist.