use a.key instead of a[:key] for named tuples

Author: Alexander-Barth

src/cfvariable.jl

@@ -448,11 +448,11 @@ checksum(v::CFVariable) = checksum(v.var)
 
 fillmode(v::CFVariable) = fillmode(v.var)
 
-fillvalue(v::CFVariable) = v._storage_attrib[:fillvalue]
-scale_factor(v::CFVariable) = v._storage_attrib[:scale_factor]
-add_offset(v::CFVariable) = v._storage_attrib[:add_offset]
-time_origin(v::CFVariable) = v._storage_attrib[:time_origin]
-calendar(v::CFVariable) = v._storage_attrib[:calendar]
+fillvalue(v::CFVariable) = v._storage_attrib.fillvalue
+scale_factor(v::CFVariable) = v._storage_attrib.scale_factor
+add_offset(v::CFVariable) = v._storage_attrib.add_offset
+time_origin(v::CFVariable) = v._storage_attrib.time_origin
+calendar(v::CFVariable) = v._storage_attrib.calendar
 """"
     tf = time_factor(v::CFVariable)