t_pb_graph_pin *** alloc_and_load_port_pin_ptrs_from_string(INP int line_num, INP const t_pb_graph_node *pb_graph_parent_node, INP t_pb_graph_node **pb_graph_children_nodes, INP const char *port_string, OUTP int **num_ptrs, OUTP int *num_sets, INP boolean is_input_to_interc, INP boolean interconnect_error_check)