/**

* Returns a Function object.

*

* ## Notes

*

* - Argument names must be strings corresponding to valid JavaScript parameters (i.e., a plain identifier, or, in environments supporting such parameters, a rest parameter or destructured parameter, optionally with a default).

* - Creating `Function` objects with the `Function` constructor is less efficient than declaring a function via a function expression or a function statement.

* - The `Function` constructor can be invoked without the `new` operator (using `new` and not using `new` both return a new `Function` object).

* - The `Function` constructor creates functions which execute in the **global scope**. Hence, created functions **cannot** access variables local to the scope in which functions were created.

*

* @param argNames - parameter names

* @param body - function body

* @returns function

*

* @example

* var add = new ns.Function( 'x', 'y', 'return x + y' );

*

* var v = add( 1, 2 );

* // returns 3

*/

Function: typeof Function;

/**

* Returns a string representing the source code of a provided function.

*

* ## Notes

*

* - If called on built-in functions, functions created by `Function.prototype.bind()`, or other non-JavaScript functions, the function returns a "native" function string similar to the following:

*

* ```text

* "function foo() { [native code] }"

* ```

*

* For intrinsic object methods and functions, `foo` is the initial name of the function.

*

* - If called on a function created by the `Function` constructor, the function returns the source code of a synthesized function declaration having the name "anonymous" and using the provided parameters and function body.

*

* - Starting in ES2018, the ECMAScript specification requires that the returned string contain the exact same source code as it was declared, including any whitespace and/or comments. If the host is unable to access the source code, the specification requires that the returned string be the native function string.

*

* @param fcn - input function

* @returns string representing function source code

*

* @example

* function add( x, y ) {

* return x + y;

* }

*

* var str = ns.function2string( add );

* // e.g., returns 'function add( x, y ) {\n return x + y;\n}'

*/

function2string: typeof function2string;