// functions overriding virtual functions from bases classes
public:
void print(const print_context & c, unsigned level = 0) const;
// functions overriding virtual functions from bases classes
public:
void print(const print_context & c, unsigned level = 0) const;
/** Calculate the trace of an expression containing color objects with a
* specified representation label.
*
/** Calculate the trace of an expression containing color objects with a
* specified representation label.
*
* @param rl Representation label */
ex color_trace(const ex & e, unsigned char rl = 0);
* @param rl Representation label */
ex color_trace(const ex & e, unsigned char rl = 0);