in Sources/TwitterApacheThrift/MutableThriftBinary.swift [76:87]
func write(_ value: Int64) {
var buffer = [UInt8](repeating: 0, count: 8)
buffer[0] = UInt8(0xFF & (value >> 56))
buffer[1] = UInt8(0xFF & (value >> 48))
buffer[2] = UInt8(0xFF & (value >> 40))
buffer[3] = UInt8(0xFF & (value >> 32))
buffer[4] = UInt8(0xFF & (value >> 24))
buffer[5] = UInt8(0xFF & (value >> 16))
buffer[6] = UInt8(0xFF & (value >> 8))
buffer[7] = UInt8(0xFF & value)
insert(bytes: buffer)
}