ActiveSupport Object#blank?

gems/activesupport/6.0/_test/test.rb

@@ -46,3 +46,14 @@ class TestAttrInternal
 "rabbit".pluralize.singularize
 "rabbit".pluralize(2).pluralize(:en).pluralize(2, :en)
 "rabbits".singularize(:en)
+
+itself if Object.new.blank? \
+            ^ nil.blank? \
+            ^ false.blank? \
+            ^ true.blank? \
+            ^ [1].blank? \
+            ^ {a: "hi"}.blank? \
+            ^ "".blank? \
+            ^ 0.blank? \
+            ^ Time.now.blank? \
+            ^ "a".present?

gems/activesupport/6.0/activesupport-generated.rbs

@@ -4414,133 +4414,6 @@ class Object
   def acts_like?: (untyped duck) -> untyped
 end
 
-class Object
-  # An object is blank if it's false, empty, or a whitespace string.
-  # For example, +nil+, '', '   ', [], {}, and +false+ are all blank.
-  #
-  # This simplifies
-  #
-  #   !address || address.empty?
-  #
-  # to
-  #
-  #   address.blank?
-  #
-  # @return [true, false]
-  def blank?: () -> untyped
-
-  # An object is present if it's not blank.
-  #
-  # @return [true, false]
-  def present?: () -> untyped
-
-  # Returns the receiver if it's present otherwise returns +nil+.
-  # <tt>object.presence</tt> is equivalent to
-  #
-  #    object.present? ? object : nil
-  #
-  # For example, something like
-  #
-  #   state   = params[:state]   if params[:state].present?
-  #   country = params[:country] if params[:country].present?
-  #   region  = state || country || 'US'
-  #
-  # becomes
-  #
-  #   region = params[:state].presence || params[:country].presence || 'US'
-  #
-  # @return [Object]
-  def presence: () -> untyped
-end
-
-class NilClass
-  # +nil+ is blank:
-  #
-  #   nil.blank? # => true
-  #
-  # @return [true]
-  def blank?: () -> ::TrueClass
-end
-
-class FalseClass
-  # +false+ is blank:
-  #
-  #   false.blank? # => true
-  #
-  # @return [true]
-  def blank?: () -> ::TrueClass
-end
-
-class TrueClass
-  # +true+ is not blank:
-  #
-  #   true.blank? # => false
-  #
-  # @return [false]
-  def blank?: () -> ::FalseClass
-end
-
-class Array[unchecked out Elem]
-  # An array is blank if it's empty:
-  #
-  #   [].blank?      # => true
-  #   [1,2,3].blank? # => false
-  #
-  # @return [true, false]
-  alias blank? empty?
-end
-
-class Hash[unchecked out K, unchecked out V]
-  # A hash is blank if it's empty:
-  #
-  #   {}.blank?                # => true
-  #   { key: 'value' }.blank?  # => false
-  #
-  # @return [true, false]
-  alias blank? empty?
-end
-
-class String
-  BLANK_RE: untyped
-
-  ENCODED_BLANKS: untyped
-
-  # A string is blank if it's empty or contains whitespaces only:
-  #
-  #   ''.blank?       # => true
-  #   '   '.blank?    # => true
-  #   "\t\n\r".blank? # => true
-  #   ' blah '.blank? # => false
-  #
-  # Unicode whitespace is supported:
-  #
-  #   "\u00a0".blank? # => true
-  #
-  # @return [true, false]
-  def blank?: () -> untyped
-end
-
-class Numeric
-  # nodoc:
-  # No number is blank:
-  #
-  #   1.blank? # => false
-  #   0.blank? # => false
-  #
-  # @return [false]
-  def blank?: () -> ::FalseClass
-end
-
-class Time
-  # nodoc:
-  # No Time is blank:
-  #
-  #   Time.now.blank? # => false
-  #
-  # @return [false]
-  def blank?: () -> ::FalseClass
-end
-
 class Object
   # Returns a deep copy of object if it's duplicable. If it's
   # not duplicable, returns +self+.

gems/activesupport/6.0/activesupport.rbs

@@ -390,6 +390,48 @@ class Array[unchecked out Elem]
   def in_groups: (untyped number, ?untyped? fill_with) ?{ (untyped) -> untyped } -> untyped
 end
 
+# active_support/core_ext/object/blank.rb
+class Object
+  def blank?: () -> bool
+  def present?: () -> bool
+  def presence: () -> self?
+end
+
+class NilClass
+  def blank?: () -> true
+end
+
+class FalseClass
+  def blank?: () -> true
+end
+
+class TrueClass
+  def blank?: () -> false
+end
+
+class Array[unchecked out Elem]
+  alias blank? empty?
+end
+
+class Hash[unchecked out K, unchecked out V]
+  alias blank? empty?
+end
+
+class String
+  BLANK_RE: Regexp
+  ENCODED_BLANKS: Concurrent::Map[Encoding, Regexp]
+  def blank?: () -> bool
+end
+
+class Numeric
+  def blank?: () -> false
+end
+
+class Time
+  def blank?: () -> false
+end
+
+# active_support/core_ext/string/inflections.rb
 class String
   def camelize: (?Symbol first_letter) -> String
   def underscore: () -> String