Method back

include/ceres/internal/fixed_array.h:238–238

FixedArray::back() Returns a reference to the last element of the fixed array.

  //
  // Returns a reference to the last element of the fixed array.
  reference back() { return *(end() - 1); }

  // Overload of FixedArray::back() to return a reference to the last element
  // of a fixed array of const values.