Set members in WeightedBlendable

Adds a node that modifies a 'WeightedBlendable'

Set members in WeightedBlendable
Struct Ref
Struct Out

Inputs

In
Exec
Struct Ref
Weighted Blendable Structure (by ref)

Outputs

Out
Exec
Struct Out
Weighted Blendable Structure (by ref)

Reference to the input struct