julia> c = Cube(PVector2D(1.0, 1.0), PVector2D())ERROR: UndefVarError: `PVector2D` not defined in `Main`
Suggestion: check for spelling errors or missing imports.
Hint: a global variable of this name also exists in PhysicalParticles.
julia> PhysicalMeshes.area(c)ERROR: UndefVarError: `c` not defined in `Main`
Suggestion: add an appropriate import or assignment. This global was declared but not assigned.
julia> c = Cube(PVector(1.0, 1.0, 1.0, u"m"), PVector(u"m"))ERROR: UndefVarError: `PVector` not defined in `Main`
Suggestion: check for spelling errors or missing imports.
Hint: a global variable of this name also exists in PhysicalParticles.
julia> PhysicalMeshes.volume(c)ERROR: UndefVarError: `c` not defined in `Main`
Suggestion: add an appropriate import or assignment. This global was declared but not assigned.