getTexture method
Read back a previously-set texture binding, or null when none
has been set.
A slot holding a RenderTexture resolves to its latest completed
frame (null before the first render).
Implementation
gpu.Texture? getTexture(
String name, {
ShaderStage stage = ShaderStage.fragment,
}) => _resolveShaderTexture(_texturesFor(stage)[name]?.source);