outcome
(
(
'pr
, 
Variant
  •    
    {
    void
     
    absent
    }
  • or 
    {
    'fs
     
    present
    }
  • or 
    {
    void
     
    ...
    }
)
, 
Mongo.failure
)
find_one (
Mongo.foreign
(
'ps
, 
'pr
, 
'fs
, 
'fs
, 
(
'pr
, 
Variant
  •    
    { 
    void
     
    absent
     }
  • or 
    { 
    'fs
     
    present
     }
  • or 
    { 
    void
     
    ...
     }
)
)
 
f
, 
 
select)

Comments

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