Gets a 64-bit integer at the current {@code readerIndex} in the Little Endian Byte Order and increases the {@code readerIndex} by {@code 8} in this buffer.
@throws IndexOutOfBoundsException if {@code this.readableBytes} is less than {@code 8}
See Implementation
Gets a 64-bit integer at the current {@code readerIndex} in the Little Endian Byte Order and increases the {@code readerIndex} by {@code 8} in this buffer.
@throws IndexOutOfBoundsException if {@code this.readableBytes} is less than {@code 8}