static if(!(!isType!From && !isAliasTuple!From && !isType!To && !isAliasTuple!To))
static if(!(isType!From))
static if(!(isType!To))
static if(isAliasTuple!From && isAliasTuple!To)
static if(!(From.typeTypeSeq.length != To.typeTypeSeq.length))
static if(From.typeTypeSeq.length == 0)