private void setUpdatedMemory(final long offset, final Bytes value) {
    maybeUpdatedMemory = Optional.of(new MemoryEntry(offset, value));
  }
Copies bytes within memory.

<p>Copying behaves as if the values are copied to an intermediate buffer before writing.

@param dst The destination address
@param src The source address
@param length the number of bytes to copy
@param explicitMemoryUpdate true if triggered by a memory opcode, false otherwise
evm/src/main/java/org/hyperledger/besu/evm/frame/MessageFrame.java