What is the name of the operator that translates from $X\rightarrow(Y\rightarrow Z)$ to $Y\rightarrow(X\rightarrow Z)$?

Question

Is there a standard name for the operator that takes a function $f:X\rightarrow(Y\rightarrow Z)$ and returns the function $f':Y\rightarrow(X\rightarrow Z)$ that satisfies, for every $y \in Y$ and $x \in X$, $f'(y)(x) = f(x)(y)$?