lib.es2015.core.d.ts: Some parameters of functions of Number is not completely right

[Ezio1212]

For example, We can use the following in es2015:

Number.isInteger(undefined); // false

but in lib.es2015.core.d.ts:
interface NumberConstructor {
// some defination codes....
isInteger(number: number): boolean;
// some other def codes...
}

thx

[nmain]

Duplicate of #34931

My search term was "isinteger"

[Ezio1212]

thanks, i will colse it.