digraph G {
                resolution=100
                rankdir=UD
                bgcolor=Transparent
              
                node [style="filled",fontname="Hack" ,shape=record] //All nodes will this shape and colour
                edge [color=Gray, fontname="Hack"] //All the lines look like this
              
                TsBase [
                label = "{TsBase| + read_ts(gpi) \l + write_ts(gpi, data) \l}"
                ]

                GriddedTsBase [
                label = "{GriddedTsBase| + __init__(path, 
                                                  grid, ioclass)  \l}"
                ]

                {TsBase}->GriddedTsBase [label="ioclass \l"]

}
