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-rw-r--r--platform/ios/docs/guides/For Style Authors.md1
1 files changed, 1 insertions, 0 deletions
diff --git a/platform/ios/docs/guides/For Style Authors.md b/platform/ios/docs/guides/For Style Authors.md
index b2ebd0de86..23766e696a 100644
--- a/platform/ios/docs/guides/For Style Authors.md
+++ b/platform/ios/docs/guides/For Style Authors.md
@@ -388,6 +388,7 @@ In style specification | Method, function, or predicate type | Format string syn
`tan` | `mgl_tan:` | `mgl_tan(0)`
`zoom` | `NSExpression.zoomLevelVariableExpression` | `$zoomLevel`
`heatmap-density` | `NSExpression.heatmapDensityVariableExpression` | `$heatmapDensity`
+`line-progress` | `NSExpression.lineProgressVariableExpression` | `$lineProgress`
For operators that have no corresponding `NSExpression` symbol, use the
`MGL_FUNCTION()` format string syntax.