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Inherits: VisualShaderNodeVarying < VisualShaderNode < Resource < RefCounted < Object
A visual shader node that sets a value of a varying.
Inputs a value to a varying defined in the shader. You need to first create a varying that can be used in the given function, e.g. varying setter in Fragment shader requires a varying with mode set to VisualShader.VARYING_MODE_FRAG_TO_LIGHT.