api/cpp/docs/api/structdmlc_1_1nullopt__t__coll__graph.dot

digraph "dmlc::nullopt_t"
{
 // LATEX_PDF_SIZE
  edge [fontname="Helvetica",fontsize="10",labelfontname="Helvetica",labelfontsize="10"];
  node [fontname="Helvetica",fontsize="10",shape=record];
  Node1 [label="{dmlc::nullopt_t\n||+ nullopt_t()\l}",height=0.2,width=0.4,color="black", fillcolor="grey75", style="filled", fontcolor="black",tooltip="dummy type for assign null to optional"];
}