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{{ definedVar is defined ? 'ok' : 'ko' }}
{{ definedVar is not defined ? 'ko' : 'ok' }}
{{ undefinedVar is defined ? 'ko' : 'ok' }}
{{ undefinedVar is not defined ? 'ok' : 'ko' }}
{{ zeroVar is defined ? 'ok' : 'ko' }}
{{ nullVar is defined ? 'ok' : 'ko' }}
{{ nested.definedVar is defined ? 'ok' : 'ko' }}
{{ nested['definedVar'] is defined ? 'ok' : 'ko' }}
{{ nested.definedVar is not defined ? 'ko' : 'ok' }}
{{ nested.undefinedVar is defined ? 'ko' : 'ok' }}
{{ nested['undefinedVar'] is defined ? 'ko' : 'ok' }}
{{ nested.undefinedVar is not defined ? 'ok' : 'ko' }}
{{ nested.zeroVar is defined ? 'ok' : 'ko' }}
{{ nested.nullVar is defined ? 'ok' : 'ko' }}
{{ nested.definedArray.0 is defined ? 'ok' : 'ko' }}
{{ nested['definedArray'][0] is defined ? 'ok' : 'ko' }}
{{ object.foo is defined ? 'ok' : 'ko' }}
{{ object.undefinedMethod is defined ? 'ko' : 'ok' }}
{{ object.getFoo() is defined ? 'ok' : 'ko' }}
{{ object.getFoo('a') is defined ? 'ok' : 'ko' }}
{{ object.undefinedMethod() is defined ? 'ko' : 'ok' }}
{{ object.undefinedMethod('a') is defined ? 'ko' : 'ok' }}
{{ object.self.foo is defined ? 'ok' : 'ko' }}
{{ object.self.undefinedMethod is defined ? 'ko' : 'ok' }}
{{ object.undefinedMethod.self is defined ? 'ko' : 'ok' }}
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