95     uint16_t childIndex;  in AddMessageForSleepyChild()  local
99     childIndex = Get<ChildTable>().GetChildIndex(aChild);  in AddMessageForSleepyChild()
100     VerifyOrExit(!aMessage.GetChildMask(childIndex));  in AddMessageForSleepyChild()
102     aMessage.SetChildMask(childIndex);  in AddMessageForSleepyChild()
125     uint16_t childIndex = Get<ChildTable>().GetChildIndex(aChild);  in RemoveMessageFromSleepyChild()  local
127     VerifyOrExit(aMessage.GetChildMask(childIndex), error = kErrorNotFound);  in RemoveMessageFromSleepyChild()
129     aMessage.ClearChildMask(childIndex);  in RemoveMessageFromSleepyChild()
188         uint16_t childIndex = Get<ChildTable>().GetChildIndex(aChild);  in HandleChildModeChange()  local
192             if (message->GetChildMask(childIndex))  in HandleChildModeChange()
194                 message->ClearChildMask(childIndex);  in HandleChildModeChange()
219     uint16_t childIndex = Get<ChildTable>().GetChildIndex(aChild);  in FindIndirectMessage()  local
223         if (message->GetChildMask(childIndex) &&  in FindIndirectMessage()
490         uint16_t     childIndex = Get<ChildTable>().GetChildIndex(aChild);  in HandleSentFrameToChild()  local
541         if (message->GetChildMask(childIndex))  in HandleSentFrameToChild()
543             message->ClearChildMask(childIndex);  in HandleSentFrameToChild()