Wire a Material Texture

Recommended sequence:

1. material.graph.inspect to find the current material graph.
2. material.palette to find the expression node to add.
3. schema.inspect for material.graph.edit operation addFromPalette.
4. material.graph.edit to add the expression.
5. schema.inspect for the connect operation.
6. material.graph.edit to connect explicit pins.
7. material.graph.layout for the touched node selection.
8. material.compile.

Use material.node.inspect and material.node.edit only when changing expression properties.