Appends a value to the attribute value of the base object.
Concats arguments (primitives single result generators)
into one string.
Joins arguments together.
Converts input arguments into a generator array [gen(arguments[i])].
A convenience function that creates a generator for current date/time.
Prepends a value to the attribute value of the base object.
'range' generator creates a list of integer generators
in the range from min to max.