how to set only top shadows?

**Is your feature request related to a problem? Please describe.**
how to set only top/right/bottom/left  shadows?

**Describe the solution you'd like**
how to set only top/right/bottom/left  shadows?

**Describe alternatives you've considered**
how to set only top/right/bottom/left  shadows?

**Additional context**
how to set only top/right/bottom/left  shadows?

