toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
return 'LettersKeyModel{n1: $n1, n2: $n2, n3: $n3, n4: $n4, n5: $n5, n6: $n6, l1: $l1, l2: $l2, l3: $l3, l4: $l4, l5: $l5, l6: $l6}\nThe Full Key : $l1 $l2 $l3 $l4 $l5 $l6';
}