pub unsafe extern "C" fn CeedOperatorGetContextDoubleRead(
op: CeedOperator,
field_label: CeedContextFieldLabel,
num_values: *mut usize,
values: *mut *const f64,
) -> c_intpub unsafe extern "C" fn CeedOperatorGetContextDoubleRead(
op: CeedOperator,
field_label: CeedContextFieldLabel,
num_values: *mut usize,
values: *mut *const f64,
) -> c_int