fm_as_sfc(x, ...)# S3 method for inla.mesh
fm_as_sfc(x, ..., multi = FALSE)
# S3 method for fm_mesh_2d
fm_as_sfc(x, ..., multi = FALSE)
# S3 method for inla.mesh.segment
fm_as_sfc(x, ..., multi = FALSE)
# S3 method for fm_segm
fm_as_sfc(x, ..., multi = FALSE)
# S3 method for sfc
fm_as_sfc(x, ...)
# S3 method for sf
fm_as_sfc(x, ...)