Order of arguments in `set_parameter!` is reverse of what is should be... :(

[Datseris]

set_state! and set_parameter! have different ordering. State has first the value then the index, while parameter has first the index then the value. First, these two should be consistent. Second, they should follow Julia base syntax which is:

setindex!(collection, value, key...)

Store the given value at the given key or index within a collection. The syntax a[i,j,...] = x is converted by the compiler to (setindex!(a, x, i, j, ...); x).

Unfortunately there is no way to fix this :( because the parameter values could have the same type as the index (such as integers) so there is no way to fix this without making a huge breaking change. :( :( :(