@sh.add_function(dsp, outputs=['fuel_density'])
def default_fuel_density(fuel_type):
"""
Returns the default fuel density [g/l].
:param fuel_type:
Fuel type (diesel, gasoline, LPG, NG, ethanol, methanol, biodiesel,
propane).
:type fuel_type: str
:return:
Fuel density [g/l].
:rtype: float
"""
return dfl.functions.default_fuel_density.FUEL_DENSITY[fuel_type]