'Constructs a Heading from the float values of the angle and variation.
@param angleValue: The angle value of this heading.
@type angleValue: C{float}
@param variationValue: The value of the variation of this heading.
@type variationValue: C{float}
@return A C{Heading } with the given values.'

@classmethod
def fromFloats(cls, angleValue=None, variationValue=None):

    variation = Angle(variationValue, Angles.VARIATION)
    return cls(angleValue, variation)
