setEffectiveWeight( weight ) {

		this.weight = weight;

		// note: same logic as when updated at runtime
		this._effectiveWeight = this.enabled ? weight : 0;

		return this.stopFading();

	}
Sets the effective weight of this action.

An action has no effect and thus an effective weight of zero when the
action is disabled.

@param {number} weight - The weight to set.
@return {AnimationAction} A reference to this animation action.