function setComplex128( arr, idx, value ) {
	arr.set( value, idx );
}
Sets an element in a `Complex128Array`.

@private
@param {Complex128Array} arr - input array
@param {NonNegativeInteger} idx - element index
@param {(Collection|Complex|ComplexArray)} value - value(s)

@example
var Complex128Array = require( '@stdlib/array/complex128' );
var Complex128 = require( '@stdlib/complex/float64/ctor' );
var real = require( '@stdlib/complex/float64/real' );
var imag = require( '@stdlib/complex/float64/imag' );

var arr = new Complex128Array( [ 1, 2, 3, 4 ] );

setComplex128( arr, 1, new Complex128( 10.0, 11.0 ) );
var v = arr.get( 1 );
// returns <Complex128>

var re = real( v );
// returns 10.0

var im = imag( v );
// returns 11.0