A base type for the uniforms within the visual shader graph. A uniform represents a variable in the shader which is set externally, i.e. from the [ShaderMaterial]. Uniforms are exposed as properties in the [ShaderMaterial] and can be assigned from the inspector or from a script. Name of the uniform, by which it can be accessed through the [ShaderMaterial] properties. Represents the size of the [enum Qualifier] enum.