IsAny checks if err is not nil and matches any one of errxx errors if match successful returns true else false Note: no unwrapping is done here.

New.

NewWithTag creates an error with tag.

WrapfWithNil returns nil if error is nil but if err is not nil wraps error with given msg unlike errors.Wrapf.

WrapwithNil returns nil if err is nil but wraps it with given errors continuously if it is not nil.

Default.

ShowStackTrace in Error Message.

ErrWithFmt is a simplified version of err holding a default format.

Error is enriched version of normal error with tags, stacktrace and other methods.

ErrCallback function to handle given error.