## 2.4 Internal context properties

`associatedVoiceContext` (context)

  The context object of the `Voice` that has the melody for this `Lyrics`.

`barCheckLastFail` (moment)

  Where in the measure did the last barcheck fail?

`beamMelismaBusy` (boolean)

  Signal if a beam is present.

`busyGrobs` (list)

  A queue of `(end-moment . grob)` cons cells. This is for internal (C++) use only. This property contains the grobs which are still busy (e.g. note heads, spanners, etc.).

`currentCommandColumn` (graphical (layout) object)

  Grob that is X-parent to all current breakable (clef, key signature, etc.) items.

`currentMusicalColumn` (graphical (layout) object)

  Grob that is X-parent to all non-breakable items (note heads, lyrics, etc.).

`dynamicAbsoluteVolumeFunction` (procedure)

  A procedure that takes one argument, the text value of a dynamic event, and returns the absolute volume of that dynamic event.

`finalizations` (list)

  A list of expressions to evaluate before proceeding to next time step. This is an internal variable.

`graceSettings` (list)

  Overrides for grace notes. This property should be manipulated through the `add-grace-property` function.

`hasAxisGroup` (boolean)

  True if the current context is contained in an axis group.

`hasStaffSpacing` (boolean)

  True if the current `CommandColumn` contains items that will affect spacing.

`lastKeySignature` (list)

  Last key signature before a key signature change.

`localKeySignature` (list)

  The key signature at this point in the measure. The format is the same as for `keySignature`, but can also contain `((octave . name) . (alter barnumber . measureposition))` pairs.

`melismaBusy` (boolean)

  Signifies whether a melisma is active. This can be used to signal melismas on top of those automatically detected.

`quotedCueEventTypes` (list)

  A list of symbols, representing the event types that should be duplicated for `\cueDuring` commands.

`quotedEventTypes` (list)

  A list of symbols, representing the event types that should be duplicated for `\quoteDuring` commands. This is also a fallback for `\cueDuring` if `quotedCueEventTypes` is not set

`rootSystem` (graphical (layout) object)

  The System object.

`scriptDefinitions` (list)

  The description of scripts. This is used by the `Script_engraver` for typesetting note-superscripts and subscripts. See ‘`scm/script.scm`’ for more information.

`slurMelismaBusy` (boolean)

  Signal if a slur is present.

`stavesFound` (list of grobs)

  A list of all staff-symbols found.

`tieMelismaBusy` (boolean)

  Signal whether a tie is present.

#### Internals Reference v2.18.2 (稳定分支).