Variable: INPUT_CAPABILITY_REQUIREMENTS

const INPUT_CAPABILITY_REQUIREMENTS: readonly ["rays", "pokes", "grabs", "grabsNative", "handJoints", "pinch", "buttonsAxes", "gaze", "pointer2d", "headPose", "haptics", "presence"];

Defined in: capabilities.ts:65

Every requirement a consumer (an interaction behaviour) can declare, as runtime data so a test can check it against the keys of NO_CAPABILITIES. Every capability appears here, and "grabs" is the one capability with two requirements.