Notation for the set of all measures on a given measurable space

Question

Let $(A, \mathscr{A})$ be a measurable space.

Is a standard notation reserved for the set of all measures $\mu$ defined in this space?

Something like $M(A, \mathscr{A}) := \{\mu \ : \ (A, \mathscr{A},\mu) \text{ is a measure space }\}$.