function baseIsFunction(value) {
	    // Avoid a Chakra JIT bug in compatibility modes of IE 11.
	    // See https://github.com/jashkenas/underscore/issues/1621 for more details.
	    return typeof value == 'function' || false;
	  }
The base implementation of `_.isFunction` without support for environments
with incorrect `typeof` results.

@private
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is correctly classified, else `false`.