/// <summary>
/// Writes the value expressed as a <c>unitSpherical</c>, which is the list of directions specified as unit spherical values <c>[Clock, Cone, Clock, Cone, ...]</c>, in radians. The clock angle is measured in the XY plane from the positive X axis toward the positive Y axis. The cone angle is the angle from the positive Z axis toward the negative Z axis.
/// </summary>
/// <param name="values">The values.</param>
public void WriteUnitSpherical(IEnumerable <UnitSpherical> values)
{
const string PropertyName = UnitSphericalPropertyName;
OpenIntervalIfNecessary();
Output.WritePropertyName(PropertyName);
CesiumWritingHelper.WriteUnitSphericalList(Output, values);
}