FilterSlice - filtering the list items using a parameter filter, where items will be returned that do not intersect with the filter with a parameter.

ReadFileByCount - filtering on the list - which filter the input slice by the criterion of the absence of an element in the list.

SliceToMap - convert a slice certificates in map, where the key is the certificate identifier and the value is the certificate itself.

SplitSlice - splits the slice into slices with the specified batchSize size.

SplitToBulks - splits the certificate slice into certificate slices with the specified batchSize size.

SwapMap - swaps the key and value.