Set members in WeightedBlendables

Adds a node that modifies a 'WeightedBlendables'

Set members in WeightedBlendables
Struct Ref
Struct Out

Inputs

In
Exec
Struct Ref
Weighted Blendables Structure (by ref)

Outputs

Out
Exec
Struct Out
Weighted Blendables Structure (by ref)

Reference to the input struct