Here is a list of all documented class members with links to the class documentation for each member:

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• ObscureCursor() : BApplication
• offset : file_io_vec, text_run
• OffsetAt() : BTextView
• OffsetBy() : BRect, BRegion
• OffsetByCopy() : BRect
• OffsetBySelf() : BRect
• OffsetFromGMT() : BTimeZone
• OffsetTo() : BRect
• OffsetToCopy() : BRect
• OffsetToSelf() : BRect
• OnClickApp() : BNotification
• OnClickArgAt() : BNotification
• OnClickFile() : BNotification
• OnClickRefAt() : BNotification
• open : fs_vnode_ops
• open_attr : fs_vnode_ops
• open_attr_dir : fs_vnode_ops
• open_dir : fs_vnode_ops
• open_index_dir : fs_volume_ops
• open_query : fs_volume_ops
• OpenWithPreferredApplication() : BUrl
• operator BCardLayout *() : BLayoutBuilder::Cards< ParentBuilder >
• operator BGridLayout *() : BGridLayoutBuilder, BLayoutBuilder::Grid< ParentBuilder >
• operator BGroupLayout *() : BGroupLayoutBuilder, BLayoutBuilder::Group< ParentBuilder >
• operator BSplitView *() : BLayoutBuilder::Split< ParentBuilder >, BSplitLayoutBuilder
• operator const char *() : BString, BUrl
• operator delete() : BMessage
• operator new() : BMessage
• operator std::string_view() : BPrivate::Network::BHttpFields::FieldName
• operator Type *() : BStackOrHeapArray< Type, StackSize >
• operator!=() : BAffineTransform, BAlignment, BCursor, BEntry, BFont, BKey, BList, BNode, BPath, BPoint, BPrivate::Network::BHttpMethod, BRect, BShape, BSize, BString, BStringList, BUrl, BVolume, entry_ref, node_ref, rgb_color, unicode_block
• operator&() : BRect, unicode_block
• operator*() : BAffineTransform, BPrivate::Network::BBorrow< T >, BPrivate::Network::BExclusiveBorrow< T >
• operator*=() : BAffineTransform
• operator+() : BPoint
• operator+=() : BPoint, BString
• operator-() : BPoint
• operator-=() : BPoint
• operator->() : BPrivate::Network::BBorrow< T >, BPrivate::Network::BExclusiveBorrow< T >
• operator/() : BAffineTransform
• operator/=() : BAffineTransform
• operator<() : BString, node_ref
• operator<<() : BString
• operator<=() : BString
• operator=() : BAffineTransform, BAlignment, BCollator, BCountry, BCursor, BDirectory, BEntry, BFile, BFont, BKey, BList, BLocale, BMessage, BMessageFilter, BMessenger, BNode, BObjectList< T >, BPath, BPoint, BPolygon, BPopUpMenu, BPrivate::Network::BBorrow< T >, BPrivate::Network::BError, BPrivate::Network::BExclusiveBorrow< T >, BPrivate::Network::BHttpFields::Field, BPrivate::Network::BHttpFields, BPrivate::Network::BHttpMethod, BPrivate::Network::BHttpRequest, BPrivate::Network::BHttpResult, BPrivate::Network::BHttpSession, BPrivate::Network::BRuntimeError, BPrivate::Network::BSystemError, BRect, BRegion, BShape, BSize, BString, BStringList, BTimeZone, BUrl, BVolume, entry_ref, node_ref, rgb_color, unicode_block
• operator==() : BAffineTransform, BAlignment, BCursor, BEntry, BFont, BKey, BList, BMessenger, BMimeType, BNode, BPath, BPoint, BPrivate::Network::BHttpFields::FieldName, BPrivate::Network::BHttpMethod, BRect, BRegion, BShape, BSize, BString, BStringList, BUrl, BVolume, entry_ref, node_ref, rgb_color, unicode_block
• operator>() : BString
• operator>=() : BString
• operator[]() : BPrivate::Network::BHttpFields, BString
• operator|() : BRect, unicode_block
• operator~() : BAffineTransform
• Options : BPrivate::Network::BHttpMethod
• Orientation() : BChannelSlider, BGroupLayout, BScrollBar, BSplitView
• orientation : direct_buffer_info
• Origin() : BPrivate::Network::BError, BView
• OutlineLevel() : BListItem
• OutputFormats() : BTranslator
• oversize_penalty : font_cache_info
• oversize_threshold : font_cache_info
• Owner() : BKey, BLayout
• OwnerChanged() : BAbstractLayout, BLayout
• ownership_policy : BUnarchiver
• OwnsStream() : BBufferedDataIO, BBufferIO