func go/types.flattenUnion

3 uses

	go/types (current package)
		union.go#L55: 	blist, tlist := flattenUnion(nil, uexpr)
		union.go#L193: func flattenUnion(list []ast.Expr, x ast.Expr) (blist, tlist []ast.Expr) {
		union.go#L195: 		blist, tlist = flattenUnion(list, o.X)

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