{
  "name": "m",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns the m value of a point geometry.",
  "arguments": [{
    "arg": "geometry",
    "description": "a point geometry"
  }],
  "examples": [{
    "expression": "m( geom_from_wkt( 'POINTM(2 5 4)' ) )",
    "returns": "4"
  }],
  "tags": ["point"]
}