pub fn declare_unknowns<Args>( ctx: &mut StepContext<'_>, args: &Args, generator: fn(&Reader<'_>, &Args) -> Result<Vec<Unknown>, GeopError>, ) -> Result<(), GeopError>where Args: PartialEq + Clone + Debug + 'static,
Declares the unknowns generator makes of args in the step being run, of the part’s Unknowns: of several declarations of one state, one that holds it fixed wins, and otherwise the first made. A plain function, like a make (Make).
generator
args
Unknowns
Make