What a panel of section controls asks to decide which controls to render — the type system says
the same thing through SectionKnobOf, but only a value can be looped over.
Example
for (constknobNameof ['color', 'opacity', 'pattern'] asconst) { if (sectionSupportsKnob(type, knobName)) renderControl(type, knobName); }
Whether the given type answers to the given knob.