def append_classpath(self, classpath):
    self._classpath = self._classpath + maybe_list(classpath)
Checks if a schema exists on the Postgres server.
dataset/ETHPy150Open pantsbuild/pants/src/python/pants/backend/jvm/tasks/jar_task.py/Jar.append_classpath--crossover with--dataset/ETHPy150Open saltstack/salt/salt/modules/postgres.py/schema_exists