Improvement request: Closure

Is is better to use php Closure and not to write php code in strings? This issue is the only one that stops me to use soft-mocks.

As it is now:

\Badoo\SoftMocks::redefineFunction(
    'strlen',
    '$a',
    'return \\Badoo\\SoftMocks::callOriginal("strlen", [trim($a)]));'
);

Can be with closure:

\Badoo\SoftMocks::redefineFunction( 'strlen', function( $a ) {
    return \Badoo\SoftMocks::callOriginal('strlen', [trim($a)]);
}) ;

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