perspective-viewer 4.5.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
Documentation 
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// ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
// ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
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// ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
// ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
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// ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
// ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
// ┃ This file is part of the Perspective library, distributed under the terms ┃
// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
// ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

//! Read-only async utilities across the engine handles.
//!
//! Each function in this module reads from one or more of [`Session`],
//! [`Renderer`], [`Presentation`] and produces a derived value without
//! mutating engine state.  Compare [`crate::tasks`], which holds the
//! state-mutating async business logic dispatched from user actions.
//!
//! [`Session`]: crate::session::Session
//! [`Renderer`]: crate::renderer::Renderer
//! [`Presentation`]: crate::presentation::Presentation

mod column_locator;
mod column_values;
mod columns_iter_set;
pub mod export_app;
mod exports;
mod fetch_column_stats;
mod get_viewer_config;
mod is_invalid_drop;
mod plugin_column_styles;
mod validate_expression;

pub use self::column_locator::*;
pub use self::column_values::*;
pub use self::columns_iter_set::*;
pub use self::export_app::*;
pub use self::exports::*;
pub use self::fetch_column_stats::*;
pub use self::get_viewer_config::*;
pub use self::is_invalid_drop::*;
pub use self::plugin_column_styles::*;
pub use self::validate_expression::*;