96   auto it = std::find(container.begin(), container.end(), value);  in IndexOfElement()  local
97   DCHECK(it != container.end());  // Must exist.  in IndexOfElement()
98   return std::distance(container.begin(), it);  in IndexOfElement()
104   auto it = std::find(container.begin(), container.end(), value);  in RemoveElement()  local
105   DCHECK(it != container.end());  // Must exist.  in RemoveElement()
106   container.erase(it);  in RemoveElement()
112   auto it = std::find(container.begin(), container.end(), old_value);  in ReplaceElement()  local
113   DCHECK(it != container.end());  // Must exist.  in ReplaceElement()
114   *it = new_value;  in ReplaceElement()
123   auto it = std::find(start, container.end(), value);  variable
124   return it != container.end();