Returns the amount of space required at boot to install trophies. This value can be used when comparing the amount of space needed
by the game to the available space value passed to the game at boot. The value is set during InstallPS3Trophies().
public static ulong GetTrophySpaceRequiredBeforeInstall() { InteropHelp.TestIfAvailableClient(); return NativeMethods.ISteamUserStats_GetTrophySpaceRequiredBeforeInstall(); }