liq| shadergraph| rm|: -OutputHelper::isOutput(), this function is unused.
liq| shadergraph|: rsl shader variables: "$node.$plug" --> "$node_$plug". Defer the replacement stage into Visitor::addShaderMethodBody()
liq| shadergraph|: +inputDes - 1. rename: inputVars --> inputSrc, outputVars --> outputSrc
liq| shadergraph|: +inputDes - 2.
liq| shadergraph|: rsl type conversion - 1. + rm_nodePlugInfo.h/.cpp
liq| shadergraph| rm|: SHADER_METHOD_BODY_I is replaced by NodePlugConnectionMgr