Implementation of get_fsalfirstlast for MPRK schemes

[SKopecz]

Due to a change in OrdinaryDiffEq in-place problems cannot be solved currently.

solve(prob_pds_linmod_inplace, MPE(); dt=0.1)

ERROR: MethodError: no method matching get_fsalfirstlast(::MPEConservativeCache{…}, ::Vector{…})

[SKopecz]

To solve the problem, I tried something similar to https://github.com/SciML/OrdinaryDiffEq.jl/blob/master/lib/OrdinaryDiffEqRKN/src/rkn_caches.jl. But it doesn't work.

@ranocha What am I doing wrong? How do we solve this problem?

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All modified and coverable lines are covered by tests ✅

Project coverage is 98.24%. Comparing base (719311e) to head (b3682ac).

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@@           Coverage Diff           @@
##             main     #119   +/-   ##
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  Coverage   98.24%   98.24%           
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  Files           7        7           
  Lines        1537     1538    +1     
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+ Hits         1510     1511    +1     
  Misses         27       27           

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[SKopecz]

@ranocha Found the problem. I didn't import get_fsalfirstlast from OrdinaryDiffEq.

[ranocha]

Thanks for the quick fix!