TikZ Graph with Graphdrawing and Layered Layout: Nested Nodes do not work at all

Question

I am using TikZ with the libraries graphs and graphdrawing together with the grid layout to generate graphs where the nodes are placed automatically by libraries. Everything, except one thing, works pretty well. Because the standard node types (rectangle, diamond, ellipse...) do not match my needs in one special but frequently case, I need to create a custom Node - rather in the meening of a Graph-Node than a TikZ-Node.

So I tried to put a tikzpicture inside a node and create the needed shape. Outside the graph this works just as expected, but insided not at all.

The reason seems to be the inherited options from the tikzpicture/scope. To solve this, I tried to find a way by

• trying to prevend the inheritance. But did not find a way to do this.
• going back to the "default" layout inside the new tikzpicture inside the node. But did not find the name of the default layout to overwrite the inherited layout.
• using an own pgf-layer for that node.
• Matrices inside the Node (of which every single element is recognized as a node and therefore treated as a graph-node...)
• things I don't remember anymore...

None of the above things works. So my questions is: How can I let embedded nodes appear as one node for the TikZ Graphs Library? Or, as an alternative, is there any other way so solve this (creating an own node-shape with variable content)?

\RequirePackage{luatex85}
\documentclass[tikz,border=1pt]{standalone}

\usepackage{tikz}
\usetikzlibrary{shapes}
\usetikzlibrary{arrows,arrows.meta}
\usetikzlibrary{graphs,graphdrawing}
\usetikzlibrary{fit}
\usetikzlibrary{positioning}
\usegdlibrary{layered}

\newcommand{\ToNode}{edge[->, looseness=0.5, out=east, in=west]}

\tikzset{NodeStyle1/.style   = {draw, anchor=east, rectangle, fill=black!10,  text height=2ex, text depth=0.25ex, minimum height=3ex}}
\tikzset{NodeStyle3a/.style  = {      anchor=east, rectangle,                 text height=2ex, text depth=0.25ex, minimum height=3ex}}
\tikzset{NodeStyle3b/.style  = {draw, anchor=east, rectangle, fill=yellow!20,                                                         minimum width=5em, text centered, inner sep=0, rounded corners}}
\tikzset{NodeStyleRaw/.style = { }}

\tikzset{PicureOptions/.style = {%
    layered layout,
    level sep=1.5cm,
    level distance=0.0cm,
    sibling sep=1.5em,
    sibling distance=1.0cm,
    grow'=right,
    components go down left aligned
}}

\pgfdeclarelayer{sub1}
\pgfdeclarelayer{sub2}
\pgfsetlayers{sub2,sub1,main}



\newcommand{\NodeInputNumName}[2]{%
\begin{tikzpicture}
    \begin{pgfonlayer}{main}
        \node[NodeStyle3a]                          (number) {No. #1};
        \node[NodeStyle3a, right = 0mm of number]   (name)   {#2};
        \draw (number.north east) -- (number.south east);
    \end{pgfonlayer}
    \begin{pgfonlayer}{sub1}
        \node[NodeStyle3b]   (frame) [fit = (number) (name)] {};
    \end{pgfonlayer}
\end{tikzpicture}
}

\begin{document}
\begin{tikzpicture}[]
    \begin{scope}[PicureOptions]
    \node[NodeStyle1]     (A)   {Graph-Node A};
    \node[NodeStyle1]     (B)   {Graph-Node B};
    \node[NodeStyle1]     (C)   {Graph-Node C};
    \node[NodeStyleRaw]   (D)   {
        \begin{tikzpicture}
            \begin{pgfonlayer}{main}
                \node[NodeStyle3a]                          (number) {No. X};
                \node[NodeStyle3a, right = 0mm of number]   (name)   {Graph-Node D, inside Graph};
                \draw (number.north east) -- (number.south east);
             \end{pgfonlayer}
             \begin{pgfonlayer}{sub1}
                \node[NodeStyle3b]   (frame) [fit = (number) (name)] {};
            \end{pgfonlayer}
        \end{tikzpicture}
    };
    \node         (ABCD) {Result ABCD};

    \draw (A) \ToNode  (ABCD);
    \draw (B) \ToNode  (ABCD);
    \draw (C) \ToNode  (ABCD);
    \draw (D) \ToNode  (ABCD);
    \end{scope}

    %%%%%%%

    \begin{scope}[]
    \node[NodeStyleRaw] at (0cm, -5cm) () {
        \begin{tikzpicture}
            \begin{pgfonlayer}{main}
                \node[NodeStyle3a]                          (number) {No. x};
                \node[NodeStyle3a, right = 0mm of number]   (name)   {Graph-Node, outside graph};
                \draw (number.north east) -- (number.south east);
            \end{pgfonlayer}
            \begin{pgfonlayer}{sub1}
                \node[NodeStyle3b]   (frame) [fit = (number) (name)] {};
            \end{pgfonlayer}
        \end{tikzpicture}
    };
    \end{scope}

    %%%%%%%%%%

    \begin{scope}[]
    \node[NodeStyleRaw] at (0cm, -10cm) () {\NodeInputNumName{5}{Graph-Node as Command, outside Graph}};
    \end{scope}


\end{tikzpicture}
\end{document}