e>TraceX                  Flag to save a history of X (iterates) {false}</pre><pre>TraceFunc               Flag to save a history of the function values
                        of the iterates {false}</pre><pre>TraceRelFunc            Flag to save a history of the relative difference
                        between the function values at the current and
                        previous iterates {false}</pre><pre>TraceGrad               Flag to save a history of the gradients of the
                        i