struct LinkedHashMap(K, E, alias hashFunc = defaultHash128!(K), alias equal = "a == b", bool retainKeys = false, alias keyEqual = "a == b", bool ovrwrtBhvr = true)
ref @
safe pure
static if(!(!retainKeys || keyEqual !is null))
static if(!(nogcIndexing))
E
opIndex
Returns the element with the given key, or E.init if key is not found.