6 files declare their use of Layer in Openlayers 7.3

Group.php in src/Plugin/Layer/Group/Group.php

Layer: Heatmap.

Heatmap.php in src/Plugin/Layer/Heatmap/Heatmap.php

Layer: Heatmap.

Image.php in src/Plugin/Layer/Image/Image.php

Layer: Image.

InlineJS.php in src/Plugin/Layer/InlineJS/InlineJS.php

Layer: JS.

Tile.php in src/Plugin/Layer/Tile/Tile.php

Layer: Tile.

Vector.php in src/Plugin/Layer/Vector/Vector.php

Layer: Vector.