code: def _from_j_state_backend(j_state_backend):
      if j_state_backend is None:
          return None
      gateway = get_gateway()
      JStateBackend = (
          gateway.jvm.org.apache.flink.runtime.state.StateBackend
      )
      JHashMapStateBackend = (
          gateway.jvm.org.apache.flink.runtime.state.hashmap.HashMapStateBackend
      )
      JEmbeddedRocksDBStateBackend = (
          gateway.jvm.org.apache.flink.contrib.streaming.state.EmbeddedRocksDBStateBackend
      )
      JMemoryStateBackend = (
          gateway.jvm.org.apache.flink.runtime.state.memory.MemoryStateBackend
      )
      JFsStateBackend = (
          gateway.jvm.org.apache.flink.runtime.state.filesystem.FsStateBackend
      )
      JRocksDBStateBackend = (
          gateway.jvm.org.apache.flink.contrib.streaming.state.RocksDBStateBackend
      )
      j_clz = j_state_backend.getClass()
  
      if not get_java_class(JStateBackend).isAssignableFrom(j_clz):
          raise TypeError(
              "The input %s is not an instance of StateBackend."
              % j_state_backend
          )
  
      if get_java_class(JHashMapStateBackend).isAssignableFrom(
          j_state_backend.getClass()
      ):
          return HashMapStateBackend(
              j_hashmap_state_backend=j_state_backend.getClass()
          )
      elif get_java_class(
          JEmbeddedRocksDBStateBackend
      ).isAssignableFrom(j_state_backend.getClass()):
          return EmbeddedRocksDBStateBackend(
              j_embedded_rocks_db_state_backend=j_state_backend
          )
      elif get_java_class(JMemoryStateBackend).isAssignableFrom(
          j_state_backend.getClass()
      ):
          return MemoryStateBackend(
              j_memory_state_backend=j_state_backend
          )
      elif get_java_class(JFsStateBackend).isAssignableFrom(
          j_state_backend.getClass()
      ):
          return FsStateBackend(j_fs_state_backend=j_state_backend)
      elif get_java_class(JRocksDBStateBackend).isAssignableFrom(
          j_state_backend.getClass()
      ):
          return RocksDBStateBackend(
              j_rocks_db_state_backend=j_state_backend
          )
      else:
          return CustomStateBackend(j_state_backend)
  
imports: from abc import ABCMeta
  from enum import Enum
  from py4j.java_gateway import get_java_class
  from typing import List, Optional
  from pyflink.java_gateway import get_gateway
  from pyflink.util.java_utils import load_java_class
label_desc: Use image node_id 1 for calling a global function with example usage: _from_j_state_backend(j_state_backend) and returns: None, HashMapStateBackend, EmbeddedRocksDBStateBackend, MemoryStateBackend, FsStateBackend, RocksDBStateBackend, CustomStateBackend