export const isNumberConstructor = (input: any): input is NumberConstructor => { return input === Number } export const isStringConstructor = (input: any): input is StringConstructor => { return input === String } export const isBooleanConstructor = (input: any): input is BooleanConstructor => { return input === Boolean } export const isDateConstructor = (input: any): input is DateConstructor => { return input === Date }