When more than one unique symbol is found in a source locator, decide what to do

[Ocramius]

Following code is perfectly valid in BetterReflection, but the outcome is rather unexpected:

class Foo {}
class Foo {}
function bar() {}
function bar() {}
const BAZ = 'baz';
const BAZ = 'baz';

Things that better reflection could do:

• throw an exception if an API such as getClass($name) is used (expecting 1 result, found 2)
• return all reflections if an API such as getClassesByName($name) is used (2 results)

This is yet to be decided.