static flattenJSON( jsonKeys, times, values, valuePropertyName ) {

		flattenJSON( jsonKeys, times, values, valuePropertyName );

	}
Used for parsing AOS keyframe formats.

@static
@param {Array<number>} jsonKeys - A list of JSON keyframes.
@param {Array<number>} times - This array will be filled with keyframe times by this method.
@param {Array<number>} values - This array will be filled with keyframe values by this method.
@param {string} valuePropertyName - The name of the property to use.