shiny maps custom editor

void ShinyMaps()
    {
        GUILayout.Label("Shiny Maps", EditorStyles.boldLabel);
        SmoothSource smoothSource = GetKeyword(smoothKeywords);
        MetalSource metalSource = GetKeyword(metalKeywords);
        OcclusionSource aoSource = GetKeyword(aoKeywords);

        bool useFirstMap = metalSource != MetalSource.None ||
            smoothSource == SmoothSource.FirstMapRedChannel || smoothSource == SmoothSource.MetallicAlpha ||
            aoSource == OcclusionSource.FirstMapBlueChannel || aoSource == OcclusionSource.FirstMapGreenChannel;
        bool useSecondMap = smoothSource == SmoothSource.SecondMapRedChannel;
        bool useAOMap = aoSource == OcclusionSource.OcclusionMap;
        int indent = useFirstMap || useSecondMap || useAOMap ? 2 : 0;

        if (useFirstMap) SingleLineTexture("_MetallicGlossMap", "_Metallic", displayName: "Metallic");
        if (useSecondMap) SingleLineTexture("_SpecGlossMap", "_Glossiness");
        if (!useFirstMap) Property("_Metallic", labelIndent: indent);
        if (!useSecondMap) Property("_Glossiness", labelIndent: indent);
        if (useAOMap) SingleLineTexture("_OcclusionMap", "_OcclusionStrength");
        else Property("_OcclusionStrength", labelIndent: indent);

        EditorGUILayout.Space();

        KeywordDropdown(smoothKeywords, smoothSource, "Smoothness Source",
            "Select none for smoothness to be controlled entirely by slider");
        KeywordDropdown(metalKeywords, metalSource, "Metallic Source",
            "Select none for metallic to be controlled entirely by slider");
        KeywordDropdown(aoKeywords, aoSource, "OcclusionSource");
        KeywordToggle("_ROUGHNESS_ON", "Using roughness?");
    }