Decoder that, given an array of values, apply the literal for each value of the array.

[gianfrancopagliaroto]

This would solve situations like this:

'key' => Decoders::union( Decoders::literal("value1"), Decoders::literal("value2"), Decoders::literal("value3"), . . . )

[ilario-pierbattista]

Hi @gianfrancopagliaroto, are you asking to add syntactic sugar for this?
Could you provide a sample?