Adding back sub graph support

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/MaterialGraphPresenter.cs

             typeMapper[typeof(SphericalIndentationNode)] = typeof(AnyNodePresenter);          // anything derived from AnyNode should use the AnyNodePresenter
             typeMapper[typeof(AACheckerboardNode)] = typeof(AnyNodePresenter);         // anything derived from AnyNode should use the AnyNodePresenter
             typeMapper[typeof(AACheckerboard3dNode)] = typeof(AnyNodePresenter);         // anything derived from AnyNode should use the AnyNodePresenter*/
-           // typeMapper[typeof(SubGraphNode)] = typeof(SubgraphNodePresenter);
+            typeMapper[typeof(SubGraphNode)] = typeof(SubgraphNodePresenter);
          //   typeMapper[typeof(RemapMasterNode)] = typeof(RemapMasterNodePresenter);
            // typeMapper[typeof(MasterRemapInputNode)] = typeof(RemapInputNodePresenter);
             typeMapper[typeof(AbstractSubGraphIONode)] = typeof(SubgraphIONodePresenter);

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/Nodes/SubgraphNodePresenter.cs

 using System;
 using System.Collections.Generic;
-using UnityEditor.Experimental.UIElements.GraphView;
 using UnityEngine;
 using UnityEngine.MaterialGraph;
 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Add-Sub-Graph.ShaderSubGraph.meta

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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/AddSubGraph.ShaderGraph.meta

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ShaderTemplates/AddSubGraph.ShaderGraph.shader

+Shader "AddSubGraph" 
+{
+	Properties 
+	{
+
+	}	
+	
+SubShader 
+{
+		Tags
+		{
+			"RenderType"="Opaque"
+			"Queue"="Geometry"
+		}
+
+		Blend One Zero
+
+		Cull Back
+
+		ZTest LEqual
+
+		ZWrite On
+
+
+	LOD 200
+	
+	CGPROGRAM
+	#pragma target 3.0
+	#pragma surface surf Standard vertex:vert
+	#pragma glsl
+	#pragma debug
+
+
+		void Unity_Add_float(float4 first, float4 second, out float4 result)
+		{
+		    result = first + second;
+		}
+
+
+
+	struct Input 
+	{
+			float4 color : COLOR;
+
+	};
+
+	void vert (inout appdata_full v, out Input o)
+	{
+		UNITY_INITIALIZE_OUTPUT(Input,o);
+
+	}
+  
+	void surf (Input IN, inout SurfaceOutputStandard o) 
+	{
+			float4 Color_Color_FD942667_Uniform = float4 (1, 0, 0, 0);
+			float4 Color_Color_C568FE2A_Uniform = float4 (0.1586208, 1, 0, 0);
+			// Subgraph for node SubGraph_F6FDDDC0
+			float4 SubGraph_F6FDDDC0_Output1 = 0;
+			{
+				float4 SubGraphInputs_23A80546_Input1 = Color_Color_FD942667_Uniform;
+				float4 SubGraphInputs_23A80546_Input2 = Color_Color_C568FE2A_Uniform;
+				float4 Add_B9CA3569_result;
+				Unity_Add_float(SubGraphInputs_23A80546_Input1, SubGraphInputs_23A80546_Input2, Add_B9CA3569_result);
+				SubGraph_F6FDDDC0_Output1 = Add_B9CA3569_result;
+			}
+			// Subgraph ends
+			o.Emission = SubGraph_F6FDDDC0_Output1;
+
+	}
+	ENDCG
+}
+
+
+	FallBack "Diffuse"
+	CustomEditor "LegacyIlluminShaderGUI"
+}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/graphs_Cracks.mat

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