What it does
material.setRoughness sets Roughness on a material object. It is a value to read rather than a call: it is written without parentheses.
Signature
material.setRoughnessArguments
It takes none.
material.setRoughness sets Roughness on a material object. It is a value to read rather than a call: it is written without parentheses.
material.setRoughnessIt takes none.