PQ - Remove columns contain null on the end

Remove columns contain null on the end

Column1	Column2	Column3	Column4		Column2	Column4
A	D	I	M		D	M
B	E	J	N		E	N
C	F	K	O		F	O
	G	L	P		G	P
	H		R		H	R

Code:

---

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    TSC = Table.SelectColumns(Source, Table.SelectRows(Record.ToTable(Table.Last(Source)), each [Value] <> null)[Name])
in
    TSC

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