code: func (self *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash {
  	stateObject := self.getStateObject(addr)
  	if stateObject != nil {
  		return stateObject.GetCommittedState(self.db, hash)
  	}
  	return common.Hash{}
  }
docs: // GetCommittedState retrieves a value from the given account's committed storage trie.