Julia: Get all the field names of composite type

‘fiednames’ function return all the field names of a composite type.

julia> type Student
           firstName::ASCIIString
           lastName::ASCIIString
           id::Int32
       end

julia> stud1 = Student("Hari Krishna","Gurram", 514)
Student("Hari Krishna","Gurram",514)

julia> fieldnames(stud1)
3-element Array{Symbol,1}:
 :firstName
 :lastName 
 :id       

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