Function Z3_model_get_func_interp 

pub unsafe extern "C" fn Z3_model_get_func_interp(
    c: Z3_context,
    m: Z3_model,
    f: Z3_func_decl,
) -> Z3_func_interp

Return the interpretation of the function f in the model m.

Return NULL, if the model does not assign an interpretation for f. That should be interpreted as: the f does not matter.

Preconditions:

• Z3_get_arity(c, f) > 0

NOTE: Reference counting must be used to manage Z3_func_interp objects, even when the Z3_context was created using Z3_mk_context instead of Z3_mk_context_rc.