Why Ruby DateTime.new_offset is not in rdoc

Question

I wanted to create an instance DateTimefor the UTC time zone using the response of this SOF report that uses the method DateTime#new_offset(0). However, I cannot find its definition in DateTimerdoc or rdoc of my parent class Date . However, the DateTimemethod actually defined:

DateTime.method_defined? :new_offset # => true

There must be a good reason why it new_offsetdoes not appear in rdoc.

Answer 1

Why is DateTime#new_offsetnot displayed in RDoc DateTime?
Because it is defined in the parent class Date.

Date#new_offset RDoc Date?
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Ruby/ext/date/date_core.c

#new_offset Date DateTime?
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DateTime#new_offset RDoc DateTime?
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Answer 2

Date. :

# d.new_offset([offset=0])  ->  date
#  
# Duplicates self and resets its offset.
# 
#    d = DateTime.new(2001,2,3,4,5,6,'-02:00')
#                              #=> #<DateTime: 2001-02-03T04:05:06-02:00 ...>
#    d.new_offset('+09:00')    #=> #<DateTime: 2001-02-03T15:05:06+09:00 ...>
def new_offset(p1 = v1)
    #This is a stub, used for indexing
end