Decorated class inheritance issue

When multiple instances extends from the same base class that has decorated properties. Children decorators 'pollutes' parent metadata. They were also attached to parent prototype.

Example:

following decorators use reflect-metadata to 'define' and 'get' metadata.

class Base {
    @SomeDecorator
    prop
}

class A extends Base {
    @SomeDecorator
    propA
}

class B extends Base {
    @SomeDecorator
    propB
}

This will result class B has three metadata, prop, propA and propB

Start by reproducing the Base, A, and B decorated-class example described in the issue with reflect-metadata. Trace how metadata is defined and retrieved across the inheritance chain, then verify that B does not acquire A's propA metadata and that parent metadata remains unchanged. The issue is open but has had no comment for 452 days.