Here are the classes, structs, unions and interfaces with brief descriptions:arrow_t Defines an arrow address dblist Phantom documentation used to test the functioning of doxygen elem Phantom documentation used to test the functioning of doxygen fsm_struct_journal Required to initialise a double-chained list fsm_struct_journal_unit Structure of a journal element fsm_struct_list_data Phantom documentation fsm_struct_list_disp Phantom documentation fsm_struct_list_tool Phantom documentation graphics_stack_t Structure describing a gl_area and its parameters, used to create a table of Gem-graph client current gl_areas pile Phantom documentation used to test the functioning of doxygen preferencesslist Phantom documentation used to test the functioning of doxygen Stack Phantom documentation used to test the functioning of doxygen stack_index_t Phantom documentation used to test the functioning of doxygen TreeNode_t Phantom documentation used to test the functioning of doxygen