field() lets you create an arrow::Field that maps a
DataType to a column name. Fields are contained in
Schemas.
field(name, type, metadata, nullable = TRUE)field name
logical type, instance of DataType
currently ignored
TRUE if field is nullable
f$ToString(): convert to a string
f$Equals(other): test for equality. More naturally called as f == other
field("x", int32())
#> Field
#> x: int32