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operation, name, details, details2 "add_custom_column", name, as.character(list(definition))
interpret_operation_add_custom_column(ft, op, file, last_op)
A flat table.
flat table
operation
file to write the code
A boolean, is the last operation?
f <- function(...) g <- as.character(list(f)) h <- eval(parse(text = g))