feature request:  multiple `p` values for `detect_lines`

i'd like to perform harmonic analysis with two different p-values on the same signal.  all other parameters the same.  it's a huge waste to call `utils.detect_lines` twice i would think.  FFT has to be done twice etc.  is there a workaround where i can save partial results?  how easy would it be to add a method which input multiple p-values?  thanks!