liquibase-core/src/main/java/liquibase/Liquibase.java
public final void dropAll(CatalogAndSchema... schemas) throws DatabaseException {
        if ((schemas == null) || (schemas.length == 0)) {
            schemas = new CatalogAndSchema[] {
                new CatalogAndSchema(getDatabase().getDefaultCatalogName(), getDatabase().getDefaultSchemaName())
            };
        }

        DropAllCommand dropAll = (DropAllCommand) CommandFactory.getInstance().getCommand("dropAll");
        dropAll.setDatabase(this.getDatabase());
        dropAll.setSchemas(schemas);

        try {
            dropAll.execute();
        } catch (CommandExecutionException e) {
            throw new DatabaseException(e);
        }
    }
public final void dropAll(CatalogAndSchema... schemas) throws DatabaseException {
        if ((schemas == null) || (schemas.length == 0)) {
            schemas = new CatalogAndSchema[] {
                new CatalogAndSchema(getDatabase().getDefaultCatalogName(), getDatabase().getDefaultSchemaName())
            };
        }

        DropAllCommand dropAll = (DropAllCommand) CommandFactory.getInstance().getCommand("dropAll");
        dropAll.setDatabase(this.getDatabase());
        dropAll.setSchemas(schemas);

        try {
            dropAll.execute();
        } catch (CommandExecutionException e) {
            throw new DatabaseException(e);
        }
    }
Drops all database objects in the passed schema(s).