transform method
Returns the unit derived from this unit using the specified converter.
Implementation
Unit transform(UnitConverter operation) {
if (this is TransformedUnit) {
TransformedUnit tf = this as TransformedUnit;
var parent = tf.parentUnit;
var toParent = tf.toParentUnit.concatenate(operation);
if (toParent == UnitConverter.identity) return parent;
return TransformedUnit(parent, toParent);
}
if (operation == UnitConverter.identity) return this;
return TransformedUnit(this, operation);
}