ScriptableRenderPipeline/MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/AbstractMasterNode.cs

using System;
using System.Collections.Generic;
using UnityEngine.Graphing;

namespace UnityEngine.MaterialGraph
{
    [Serializable]
    public abstract class AbstractMasterNode : AbstractMaterialNode, IMasterNode
    {
        protected override bool generateDefaultInputs { get { return false; } }

        public override IEnumerable<ISlot> GetInputsWithNoConnection()
        {
            return new List<ISlot>();
        }

        public override bool hasPreview
        {
            get { return true; }
        }

        public abstract string GetShader(GenerationMode mode, out List<PropertyGenerator.TextureInfo> configuredTextures);
    }
}