[ BlockLemma
    ( SourcePos
        { sourceName = "test/examples/separation.tex"
        , sourceLine = Pos 1
        , sourceColumn = Pos 1
        }
    )
    ( Marker "sep_test" )
    ( Lemma []
        ( StmtFormula
            ( FormulaChain
                ( ChainBase
                    ( ExprVar
                        ( NamedVar "X" ) :| []
                    ) Positive
                    ( RelationSymbol
                        ( Symbol "=" )
                    ) []
                    ( ExprSep
                        ( NamedVar "x" )
                        ( ExprVar
                            ( NamedVar "X" )
                        )
                        ( StmtFormula
                            ( FormulaChain
                                ( ChainBase
                                    ( ExprVar
                                        ( NamedVar "x" ) :| []
                                    ) Positive
                                    ( RelationSymbol
                                        ( Symbol "=" )
                                    ) []
                                    ( ExprVar
                                        ( NamedVar "x" ) :| []
                                    )
                                )
                            )
                        ) :| []
                    )
                )
            )
        )
    )
]