BeginReassembly returns a fresh, empty reassembly with the given capacity.

BeginReassemblyArray returns an empty reassembly backed by the given array.

Copy as many bytes as possible from *in to *out, and advance the start pointers of both *in and *out past the copied bytes.

CopyNew returns a fresh slice containing the same bytes as an existing slice.

CopyReassemble copies bytes from *in to the blank portion of *out.

ExistingReassemblyArray returns a reassembly backed by the given array, with n bytes already present.

TransformReassemble is like copyReassemble, but uses a transformation function from a slice to a slice of equal length on the data.

Zero sets all bytes of a slice to zero.

A reassembly is a prefix of a dedicated array.