And creates AND from a list of conditions.

Eq is `=`.

Gt is `>`.

Gte is '>='.

Lt is '<'.

Lte is `<=`.

Neq is `!=`.

Or creates OR from a list of conditions.

package errors.

package errors.

package errors.

package errors.

package errors.

package errors.

package errors.

package errors.

package errors.

EventReceiver is a sentinel EventReceiver; use it if the caller doesn't supply one.