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Joseph Weston authored
Specifically: finalized Builder, PrecalculatedLead, ModesLead and SelfEnergyLead This can be used to inspect the parameters on which a system depends, and can be later used to give more informative error messages. Adding 'parameters' to ModesLead and SelfEnergyLead is strictly a backwards-incompatible change, however this is an advanced feature of Kwant and we don't want to let this block adding 'parameters' to the system API.
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