@is_map(value)
See also Predicates @!=, @&&, @||, @<=, @<, @==, @>=, @>, @approx, @arch_darwin, @arch_linux, @arch_windows, @between, @empty, @find, @is_bool, @is_defined, @is_exec, @is_fct, @is_float, @is_function, @is_int, @is_integer_indexed, @is_list, @is_map, @is_nim, @is_numeric, @is_obj, @is_obj_xxx, @is_prefix, @is_string, @is_subsequence, @is_suffix, @is_symbol, @is_undef, @is_vector, @member, @occurs