AssertInterface::isNull and AssertInterface::isNotNull
AssertInterface::isCallable and AssertInterface::isNotCallable
AssertInterface::isObject and AssertInterface::isNotObject
AssertInterface::isArray and
AssertInterface::isNotArray
AssertInterface::isString and AssertInterface::isNotString
AssertInterface::isNumeric and AssertInterface::isNotNumeric
AssertInterface::isInteger and AssertInterface::isNotInteger
AssertInterface::isDouble and AssertInterface::isNotDouble
AssertInterface::isResource and AssertInterface::isNotResource
AssertInterface::isBoolean and AssertInterface::isNotBoolean