tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(2,14): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(8,5): error TS2345: Argument of type '{ x: boolean; y: number; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
Types of property 'x' are incompatible.
Type 'boolean' is not assignable to type 'string'.
!!! error TS2345: Argument of type '{ x: boolean; y: number; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
!!! error TS2345: Types of property 'x' are incompatible.
!!! error TS2345: Type 'boolean' is not assignable to type 'string'.