Caller returns filename and line number info for the specified stack depths.

IsError returns true if err is non-nil and the error string matches the supplied regexp.

IsPError returns true if pErr is non-nil and the error message matches the supplied regexp.

IsSQLRetryError returns true if err is retryable.

MakeCaller returns a function which will invoke Caller with the specified arguments.

MakeKey makes a new key which is the concatenation of the given inputs, in order.

NewNodeTestBaseContext creates a base context for testing.

NewTestBaseContext creates a secure base context for user.

SortStructs sorts the given slice of structs using the given field as the sort key.